Review!

Slope-Intercept Form

100

Slope = 4

y-intercept = -7

y=4x-7

200

Slope = 1/8

y-intercept = 24

y=1/8x+24

300

Line passes through; (1,12) and (0,9)

y=3x+9

400

Line passes through; (0,-7) and (8,-5)

y=1/4x-7

500

(0,-2) and (3,4)

y=2x-2

Point Slope Form

100

Slope = -3

Point = (9,2)

y-2=-3(x-9)

200

Slope = 8

Point = (6,2)

y-2=8(x-6)

300

(9,7) and (4,5)

y - 7 = 2/5 (x-9)

400

(-2,7) and (3,-5)

y-7=-12/5(x+2)

500

(-2,6) and (4,7)

y - 6 = 1/6 (x+2)

What's my slope?

100

(12,8) and (4,3)

5/8

200

(7,9) and (13,5)

-2/3

300

(-2,6) and (4,7)

1/6

400

(0,4) and (0,7)

0

500

(-9,-7) and (7,-4)

3/16

Point-Slope form to Slope-Intercept Form

100

y-2=8(x-3)

y=8x-22

200

y+17=-3(x-1)

y=-3x-14

300

y-11=1/5(x-5)

y=1/5x+10

400

y+2=1/6(x-3)

y=1/6x-2.5

500

y+3=-5(x+13)

y=-5x-68

Random

100

If you graphed y=-1, what would it look like?

A Horizontal line running through -1

200

What is point-slope form?

y-y₁=m(x-x₁)

300

Define a positive slope

As the x value increases, the y value increases.

It goes up to the right

400

Solve for x.

5x+3=7x-1

2

500

Terra bought 5 boxes of noodles, 7 jars of sauces, and 2 bags of cheese.  She paid a total of $45.50.  If each box of noodles cost $2.34 and each jar of sauce cost $3.54.  How much does one bag of cheese cost?

$4.51