8th Grade Math Exam Review

Functions

100

In order for a relation to be a function, the _____ can not repeat; this means that each input has exactly one output.

What are the "x-values"?

200

Describe whether or not the relation below is a function: (3, 2), (-3, 2), (5, 2), (-5, 2)

This is a function because the x-values do not repeat.

300

This is used to determine whether or not a graph is a function.

What is the vertical line test?

400

The equation of the linear function that passes through the points (1, 3), (3, 5), and (4, 6)

What is y=x+2

500

Which ordered pair represents a point that would lie on the graph of the linear function y = 2x - 4? Explain how you know. (2, 4), (6, 8) (-2, 0) or (5, 1)

What is (6, 8) because if you substitute in 6 for x into the linear function, the correct output is 8.

Algebra and Geometry

100

Noah knows two of the angle measures of triangle PQR. Angle Q is 75 degrees and angle R is 51 degrees. What is the measure of angle P?

54 degrees

200

Kaylah wants to know if a photograph is dilated by a scale factor of 2 and the original photograph is 3 by 7 what will the new photograph perimeter be? A. 14 C. 40 B. 18 D. 30

C. 40

300

Madison & Jonathan compared their bowling scores. Jonathon's score was 109 points greater than Madison's total score. Write an expression that represents Jonathan's score based on m, Madison's score. a) m - 109 b) m + 109 c) 109/m c) m + J = 109

b) m + 109

400

At her job, Ashley is paid $40 for the day. When she drives her car for work she is paid an additional $0.52 per mile. Write an equation to represent how much she earns in a day. How much is Ashley paid for the day if she drives 100 miles in her car?

y = 40 + 0.52x $92

500

Solve for x: 3(x - 8) + 2(x + 3) = 7

x = 5

Simply Solve

100

The Value of X in 3X+8=23

x = 5

200

The value of X in 6X+4X=40

x = 4

300

The value of X in 8X-2X=36

x = 6

400

The value of X in X/4=12

x = 48

500

Solve for X in 5(2X-7)=65

x = 10

Vocabulary

100

A number all by itself in an equation

Constant

200

Means "Rate of Change"

Slope (or constant of proportionality)

300

A letter that represents a Number in an equation.

Variable

400

The number lines on a graph that are labeled X and Y.

Axes (or x-axis and y-axis)

500

The four sections of a graph that are created by the axes.

Quadrants (I, II, III, IV)

On a Graph

100

The X-Coordinate of point S(0,7)

0

200

Point T (2,-8) is located in which quadrant.

Quadrant IV

300

The ratio (fraction) which represents slope in words.

Rise / Run

400

The sign of the slope if the line goes up from quadrant III towards quadrant I

Positive

500

Slope of a horizontal line.

0