Answers FL-1200375-Algebra 1-A CR Semester 2Unit Test

Unit Test — Cumulative exam Answers

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Frank invests $1,000 in simple interest investment account that pays 8% a year. After a number of years, he withdraws his balance of $2,200. Using the formula , how many years was his money invested?

2.75 years

10 years

15 years

27.5 years

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Which is the graph of linear inequality x – 2y ≥ –12?

Option

Which relationships could have a negative correlation? Select three options.number of hours worked and free timespeed of a car and minimum stopping distancethe speed of a train and the length of time to reach the destinationadult’s head circumference and agea tadpole’s age and the length of it’s tail

number of hours worked and free time

speed of a car and minimum stopping distance

the speed of a train and the length of time to reach the destination

adult’s head circumference and age

a tadpole’s age and the length of it’s tail

Which is the graph of linear inequality 6x + 2y > –10?

Option

What is the solution to –2(8x – 4) < 2x + 5?

x >

x <

x > 6

x < 6

Maria gathered the data in the table. She finds the line of best fit to be y = 2.78x – 4.4.

–6.72

–0.58

0.58

6.72

The function graphed is reflected across the x-axis to create a new function.

Both the domain and range change.

Both the range and domain stay the same.

The domain stays the same, but the range changes.

The range stays the same, but the domain changes.

Which best describes the solution set of the compound inequality below?2 + x ≤ 3x – 6 ≤ 12

4 ≤ x ≤ 9

4 ≤ x ≤ 6

–2 ≤ x ≤ 2

–2 ≤ x ≤ 3

Which table shows no correlation?

A 2-row table with 7 columns. The first row is labeled x with entries 3, 5, 6, 8, 10, 14, 15. The second row is labeled y with entries negative 1, negative 2, negative 3, negative 2, negative 5, negative 4, negative 8.

A 2-row table with 7 columns. The first row is labeled x with entries 3, 5, 6, 8, 10, 14, 15. The second row is labeled y with entries negative 6, negative 7, negative 4, negative 2, 0, negative 1, positive 3.

A 2-row table with 7 columns. The first row is labeled x with entries 3, 5, 6, 8, 10, 14, 15. The second row is labeled y with entries negative 2, negative 4, positive 6, positive 8, positive 12, positive 10, negative 16.

A 2-row table with 7 columns. The first row is labeled x with entries 3, 5, 6, 8, 10, 14, 15. The second row is labeled y with entries negative 3, negative 5, negative 9, negative 11, negative 13, negative 15, negative 17.

A function g(x) is defined as shown.g(x) = What is the value of g(4)?

Shannon graphed the system of equations.7x – 4y= –8y = x – 3What is the closest approximate solution to the system of equations?

(–5, –7.2)

(–5, –6.8)

(–5, –6.2)

(–5, –5.9)

What does a residual value of 1.3 mean when referring to the line of best fit of a data set?

A data point is 1.3 units above the line of best fit.

A data point is 1.3 units below the line of best fit.

The line of best fit has a slope of –1.3

The line of best fit has a slope of 1.3.

Dwight creates a table of values for a function and plots the points. He finds that one y value divided by the next y value produces the same answer each time. What kind of function did he graph?

linear

quadratic

square root

exponential

A store sells a certain tile for $2 per tile and a pint of paint for $3. A second store sells the same items for $1 per tile and $4 per pint of paint. Ari bought the same number of tiles and pints of paint at both stores, costing him $26 at the first store and $18 at the second store, before tax.

A system of equations. 3 x plus 4 y equals 18. x plus 2 y equals 26.

A system of equations. x plus 3 y equals 18. 2 x plus 4 y equals 26.

A system of equations. 2 x plus 3 y equals 26. x plus 4 y equals 18.

A system of equations. 3 x plus 2 y equals 26. 4 x plus y equals 18.

Question text not available

all real numbers

all real numbers less than or equal to 0

all real numbers less than or equal to 1

all real numbers greater than or equal to 1

An electrician is hired to install a ceiling fan. She estimates that the installation will take no more than 45 minutes if the house is up to building code. If the house is not up to building code, she estimates that the installation will take longer than 120 minutes. Which graph represents the number of minutes it could take her to install the fan?

Option

The radius and circumference of several objects were measured.

It is a weak positive correlation, and it is not likely causal.

It is a weak positive correlation, and it is likely causal.

It is a strong positive correlation, and it is not likely causal.

It is a strong positive correlation, and it is likely causal.

Which scenario can be represented using the inequalities below?1.25 < x < 1.5

A container of milk costs at least $1.25 but less than $1.50.

A student spends at least 1 hour 15 minutes, but no more than 1 hour 30 minutes on homework.

A tip added to a restaurant bill is less than or equal to 25% or less than or equal to 50%.

The point value of a test item is more than 1.25 points and less than 1.5 points.

The quadratic model f(x) = –5x2 + 200 represents the approximate height, in meters, of a ball x seconds after being dropped. The ball is 50 meters from the ground after about how many seconds?

2.45

3.16

5.48

7.07

According to the rule of 72, which statement is true?

An investment of $3,100 will double in 12 years at a compound interest rate of 5%.

An investment of $9,000 will double in 10 years at a compound interest rate of 7%.

An investment of $4,500 will double in 8 years at a compound interest rate of 9%.

An investment of $3,000 will double in 4 years at a compound interest rate of 12%.

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Unit Test — Cumulative exam Answers

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