5.3 Slope-intercept form

Identify slope and y-intercept of the graph & graph an equation in slope-intercept

form. day 1

Linear equation: An equation that models a linear function.

y-intercept: 1. The y-coordinate of a point where the graph crosses the y-axis. 2. where x= 0

y-intercept: (0,2) or 2

y-intercept: (0, -3) or -3

y-intercept: (0,0) or 0

Find the y-intercept:

Slope-intercept form of a linear equation:

y = mx + bslope y-intercept

Identify the slope and y-intercept.

y = -2x + 3 y = 6x y = 5

m = y-int =

-23

m = y-int =

60

m = y-int =

05

y = mx + by = 0x + 5

y = mx + by =6x+ 0

y = mx + b

Write an equation in slope-intercept form given the slope (m) and y-intercept (b).

m = 2 y-int = -3

y = 2x - 3

m = y-int = 7

y = mx + b x + 7

y = mx + b

Write an equation given the graph of a line.

2. Identify: m =

b =

34

1

y = mx + b

x + 1

1. Find 2 points on the line

y = mx + b

Write an equation given the graph of a line.

2. identify: m =

b =

−21

-1

y = mx + b

x - 1

1. Find 2 points on the line

= -2

Assignment: page 312: 7-21 all, 63-66, and 74-77