Pre-Algebra Final Review

Definitions

1

What does equivalent mean?

equal to

2

What is the slope-intercept form equation?

y=mx + b

3

What does m stand for in slope intercept form?

slope

4

What is a y-intercept?

where the line crosses the y-axis

5

What does constant of proportionality mean?

slope of direct proportion

Solve that

1

What is the equation for a horizontal line that crosses the y-axis at -4?

y = -4

2

Solve:

3(2 - 5x) > x - 10

x < 1

3

What number best represents π (pi)? 

3.14

4

What is the best approximation of √35?

5.9 and 6

5

Find the slope and y-intercept for this equation:

2x + y + 3 = 0.

m = -2

b = -3

Definitions AGAIN!

1

What does b stand for in slope-intercept form?

y-intercept

2

What is an inequality?

an equation written with < or >

3

What is the equation to use for a direct proportion?

y = kx

4

How many solutions does an identity have?

infinite

5

What is the name of a line with an undefined slope?

vertical line

Solve that ... pls

1

What is the slope of a horizontal line?

0

2

How do you find the slope of a line?

(y₁ - y₂) / (x₁ - x₂) OR (y₂ - y₁) / (x₂ - x₁)

3

Solve :

(-3b)⁴

81b⁴

4

What is the solution for this equation:

5x - 2 = 7x - 8

x = 3

5

List these in order from LEAST to GREATEST:

√4, √2, ∛3, (√9)/2

√2, ∛3, (√9)/2, √4

Mystery <3

1

What point does direct proportion cross?

(0,0)

2

Does a line with a slope that goes up, negative or positive?

positive

3

What's an easy way to solve for the slope of a direct proportion?

k = rise / run OR k = y / x

4

Round this number to 4 significant digits: 

1.6180339887

1.618

5

Solve: 

2(1 - x) - 4(5 + x) = 3x

x = -2