Equations of A line

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

m=5

point (3,-2)

y+2=5(x-3)

400

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

y+5=-2(x-3)

y-7=-2(x+3)

500

(-3,-6) and (-4,-7)

y+6=1(x+3)

y+7=1(x+4)

What's my slope?

100

(1,8) and (-3,-8)

4

200

(-1,9) and (1,5)

-2

300

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

0

400

(0,4) and (0,7)

undefined

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