8th Grade Math Review

8th Grade Math 1

100

What is slope intercept formula?

y=mx+b

200

y=mx+b, what part of the formula is the slope?

m

300

What is another name for slope?

Rate of change, unit rate, m, constant of proportionality

400

What is another name for the y-intercept?

Starting point, fee

500

What is the y-intercept of the line?

2 

8th Grade Math 2

100

A park is 8.62 x 10^3 sq. feet. Park B is 1.56 x 10^5 sq. feet. How many times greater is Park B than Park A? Round to the nearest 10th.

18.1

200

Write the number below in standard notation

.000452

4.52 x 10^-4

300

If a relationship has one positive and one negative, what type of association is it?

negative

400

On a graph, how can you determine if graph is proportional?

the line goes thru the origin

500

What are the 2 properties that nonlinear functions have?

x in denominator and exponents greater than 1

8th Grade Math 3

100

How can you determine if a table has a constant rate of change and what the slope is?

Find the change in y -and- the change in x... then divide them.    (delta y)/(delta x)

200

A ladder is 12 feet long. It is placed 4 feet away from the wall. How far up the wall is the ladder? Round the nearest whole number

11

300

The opposite of squaring a number is taking the...

Square root

400

An irrational number is a number that...

never ends (terminates) AND never repeats in a pattern

500

How many solutions are there?

3x-2=3x+4

No Solution

8th Grade Math 4

100

x²=81

x=+/-9

200

Solve the inequality.

5x - 3(x+6) > 8 - (x-7)

x > 11

300

What is a function?

x values dont repeat

400

Is the set a function? (1,4) (-1,4) (3,6) (5,8)

What is the domain?

Yes. Domain: {-1, 1, 3, 5} (all x values)

(Must be ordered from least to greatest.)

500

Which one has the greatest rate of change?

A: 3y = 9x+16

B: (4,4)  (6,12)

b

8th Grade Math 5

100

Is this a function?  What is the range?

{(1,2) (3,8) (5,6) (7,8) (9,8)}

Yes. Range: {2, 6, 8} 

(All y values, but the numbers should not repeat when listed.)

200

If the input of a linear function y= 2x - 8 is -4, what is the output?

-16

300

What is the value of x when you have a hypotenuse of 19.7, and a side length of 18. Round to the nearest whole number

8

400

Is this a RELATION, FUNCTION, NEITHER, or BOTH?

What is the Domain?

{(0,1) (2,4) (4, 6) (0,8) (6, 10)}

RELATION

Domain: {0,2,4,6}

500

What is the length of the hypotenuse when the legs are 6 and 9? Round to the nearest 10th

a²+ b² = c²

6² + 9² = c²

36 + 81 =117

c = 10.8

8th Grade Math 6

100

A = P + Prt            Solve for t.

(A-P)/(Pr) 

200

What is the slope of  2y=7x+12

7/2 

300

Simplify:  2³ x 2¹

2⁴=16

400

A = h(b₁+b₂)                               Solve for b₁   

b₁ = A/h - b₂ 

500

Write the solution to the inequality.

-8(x-1)-x < -28

x > 4