Unit Test — Cumulative exam

Question 1

Point E is drawn on the graph so that line EF is parallel to line CD.

Revolt · Accepted Answer

−8

Question 2

Which linear function represents the line given by the point-slope equation y – 2 = 4(x – 3)?

Revolt · Accepted Answer

f(x) = 4x – 10

Question 3

Sun, a kayaker, paddles 8 miles upstream (against the current) in 2 hours. Returning to her original location, she paddles downstream (with the current) the same distance in 1 hour. The equations represent x, the paddling speed, and y, the speed of the current.2(x – y) = a b(x + y) = 8Which are true? Select two options.a = 8b = 8a = 1b = 1a = b

Revolt · Accepted Answer

a = 8; b = 1

Question 4

The tables represent the functions f(x) and g(x).

Revolt · Accepted Answer

x = –6

Question 5

The potential energy, P, in a spring is represented using the formula P = kx2. Lupe uses an equivalent equation, which is solved for k, to determine the answers to her homework.

Revolt · Accepted Answer

k =

Question 6

Which best describes the range of the function f(x) = 2(3)x?

Revolt · Accepted Answer

y > 0

Question 7

What are the domain and range of f(x) = 4x – 8?

Revolt · Accepted Answer

domain: {x | x is a real number}; range: {y | y > –8}

Question 8

The simple interest formula is I = Prt, where I represents simple interest on an amount, P, for t years at a rate of r, where r is expressed as a decimal.

Revolt · Accepted Answer

$80

Question 9

Line JK passes through points J(–3, 11) and K(1, –3). What is the equation of line JK in standard form?

Revolt · Accepted Answer

7x + 2y = 1

Unit Test — Cumulative exam Answers

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