GT Math Review

Positive/Negative Numbers

100

3+(-2)

1

200

-4+3

-1

300

4-(-2)

6

400

-9-(-3)

-6

500

-10-4

-14

Find x

100

x+1=3

x=2

200

2x=14

x=7

300

5-2x=2+x

x=1

400

-6x+1=x-2

x=-1/7

500

9(x-2)=7x+5

x=23/2

y=mx+b

100

which letter in y=mx+b represents the y-intercept?

b

200

What is the slope of the line with the equation y=-1/4x+3

the slope is -1/4

300

What is the y-intercept of the line in the equation -20=4x-y

the y-intercept is 20

400

Find y when x=3 

y=6x+8

y=26

500

Is (-1,-5) a solution to the line y=x-4

yes!

Slope

100

How do you find the slope of a line on a graph?

rise over run

200

How do you find the slope of a line when you have two points?

y_2-y₁/x₂-x₁

300

How do you know if a line has a negative slope?

The m in y=mx+b is negative or the line is going down from left to right

400

Calculate the slope between the two points (-1,3) and (-4,7)

m=4/-3

500

What is the slope represent in this scenario?

Mary’s savings account has $50 in it at the start of the year and $20 is deposited each week. After x weeks, there are y dollars in the account.

m=20

Miscellaneous

100

What is the spiderman method actually called?

Distribution/Distributive Property

200

What can I combine?

4x-x+3-2=5x

4x-x=3x

3-2

300

Make a sketch of a linear relationship with a slope of 1/4 and a negative y-intercept

Let's see your graph!

400

What mistake was made?

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

2. 3x+4=6+2x

3. x+4=6

4. x=2

distribution: -2 multiplied by x is -2x

500

Write an equation for the situation:

A pizza company charges a $4 delivery fee, and each pizza costs $9. What is the total cost, y, of buying x number of pizzas? 

y=9x+4 or y=4+9x