501 Geometry Questions

Slope-Intercept Form of Linear Equations

The second form for linear equations is the Slope-Intercept form:

Slope-Intercept Form of Linear Equations:y = mx + b, where m

and bare numbers and xand yremain as variables. This form is partic-

ularly useful since mwill always be the slope and bwill always be the

y-intercept. The y-interceptis where the line crosses the y-axis. Lines

in this form are easy to graph: plot the y-intercept, use the slope to

plot two other points, and connect!

rise = 2

rise = 1

run = − 3

run = 3

2

− 3

y axis

(−4,0) y-intercept

(0,2) y-intercept

x axis

y = x −^4

1

y = 3

x + 2

2

m = =− 3

y

x

1

m = = 3

y

x

501 Geometry Questions