Equations of Linear Functions

Equations of Linear Functions

Slope-Intercept Form

Point-Slope Form

y=mx+b

y-y1 =m(x+x1)

Two-point Form

Intercepts Form

How do they function?

The Slope-Intercept Form. If the graph of a linear function y has slope m and y-intercept b, then its equation is y=mx+b

Let’s have some example:

1. m = 3, b = -1

2. m = -2, b =

3. m = 2, b = 0

Let’s Practice

m= -1 , b= 1/2

Answer this orally:

y= -x + 1/2m= -5 , b= -3/2y= -5x - 3/2m= 1/2 , b= 6y = 1/2x + 6m= -1/3 , b= 3y= -1/3x + 3m= 3/2 , b= -2y= 3/2x - 2