AnswersLCS-Teacher Remediation-MJ Grade 8 Pre-Algebra_Q1Unit Test

Unit Test — Unit test Answers

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Jay went to an amusement park. The park charges an entrance fee of $10.50 and $4.50 for every ride. Jay spent $46.50 on entrance fees and rides. Which fuction can be used to find the number of rides he went on?

A
f (x) = 4.5 x + 10.5
Option A
B
f (x) = 4.5 x
Option B
C
f (x) = 4.5 x minus 10.5
Option C
D
f (x) = negative 4.5 x
Option D
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Which graph is a function of x?

A
On a coordinate plane, a vertical line is at x = negative 3.
Option A
B
On a coordinate plane, a v-shaped graph opens up.
Option B
C
On a coordinate plane, a parabola opens to the right.
Option C
D
On a coordinate plane, one curve opens to the left and another curve opens to the right.
Option D
23

Jada fills the bathtub before taking a bath and then allows the water to drain when she is done. The graph below models the number of gallons of water, y, in the bathtub over time, t, in minutes. Is the number of gallons of water in the bathtub a function of time?

Question illustration
A
Yes because each t value is paired with exactly one number of gallons.
B
Yes because the number of gallons is bounded between y = 0 and y = 36.
C
No because each number of gallons is paired with more than one t value.
D
No because from t = 5 to t = 20 the number of gallons of water is constant.
24

Carlotta handpaints T-shirts and sells them to her friends. She uses the equations below to determine her costs to produce shirts and the amount of money earned when she sells the shirts.Production Cost: , where c is the total cost and s is the number of shirtsMoney Earned: , where m is the amount of money earned from sales and s is the number of shirts How many shirts must Carlotta sell to make a profit?

Question illustration
A
2
B
3
C
4
D
5
25

Lorraine writes the equation shown.She wants to describe the equation using the term relation and the term function.The equation represents

Question illustration
A
a relation and a function
B
a relation but not a function
C
a function but not a relation
D
neither a relation nor a function

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