8th Grade Chapter 4 Math Review

Graph the Equation

100

y=5

Horizontal line at y 5

200

y=10

Horizontal line at y 10

300

x=2

Vertical line passing through x at 2

400

x=7

vertical line passing through x at 7

500

y=4x+2

passes through (-1/2,0) and (0,2)

Find the Slope

100

Find the slope of a line that passes through points (-2,0) and (2,3).

3/4

200

Find the slope of a line that passes through points (8,10) and (11,12)

2/3

300

Find the slope of a line that passes through points (-4,-5) and (-8,-10)

5/4

400

Find the slope of a line that passes through points (-1,5) and (6,5)

0

500

Find the slope of a line that passes through points (10,-1) and (10,2)

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Slope-Intercept Form

100

2x+3y=12

y=-2/3x+4

200

  x+y=15

y=-x+15

300

-14x+y=12

 y=1/4x+12

400

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

y=3x+2

500

(-9,5) and (-3,3)

y=-1/3 x+2

Point-Slope Form

100

 (2,6) m=2

y-6=2(x-2)

200

(2,-1) m=15

 y+1=⅕(x-2)

300

(1,-3) m=4

y+3=4(x-1)

400

(7,-5) m=-1/7

y+5=-1/7(x-7)

500

(4,8) m=3/4

y-8=3/4(x-4)

Intercepts

100

Find the y-intercept:

y=2x-4

-4

200

Find the x-intercept:

 y=x+5

-5

300

Find the y-intercept:

 y-3=-12x

3

400

Find the x-intercept:

 y=-5x+10

500

Find the y-intercept:

2x+6y=12

2