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

Systems of Equations

100

Solve: x - y = 11 and 2x + y = 19

What is (10, -1)?

200

-6x + 5y = 1 and 6x + 4y = -10

What is (-1, -1)?

300

7x + 2y = 24 and 8x + 2y = 30

What is (6, -9)?

400

3x − 2y = 2 and 6x − 5y = 8

What is (-2, -4)?

500

A test has twenty questions worth 100 points. The test consists of True/False questions worth 3 points each and multiple choice questions worth 11 points each. How many multiple choice questions are on the test?

What is 5 multiple choice questions?

Equations

100

Solve for x.

4x-3=7x-4-3x

No Solution

200

Which equation will have only one solution?

A.  4(x-2) = 4(x-2)

B.  6(x+3) = 6(x-3)

C.  1/2(x+9)=15

D.  2/3(x-6) = 2/3 x

What is C

300

Write an equation in slope intercept form of the line that passes through the points (4,13) and (8,18)

A.  y= 2.5x +3        D.  y= 1.25x+8

B.  y= 1.5x + 7

C. y= 2x + 5

D

400

Use the ordered pairs to write an equation in slope intercept form.

(2,-9)  (4, -6)  (6, -3)  (8,0)

y= 3/2 x - 12

500

Which of the following equations have no solution?

A.  13-7x = -7x + 13

B. 1/3(6x+9) = 12

C.  1/4(8x+4)= 2x -4

D.  -10x + 5 = 3-10x+2

C

Scientific Notation

100

Write 567,327 in scientific notation.

What is 5.67327 x 10^5

200

Write 0.000678 in scientific notation.

What is 6.78 x 10^-4

300

Write (4 x 10^3) (2 x 10^4) in scientific notation.

What is 8 x 10^7?

400

When dividing scientific notation expressions, you _____ the first factors and ________ the exponents.

What is divide the first factors and subtract the exponents?

500

A rectangular section of a wheat farm has a length of 5 x 10^4 meters and a width of 6 x 10^3 meters. What is the area of the wheat farm in scientific notation?

What is 3 x 10^8 square meters?