Download 5.3 Slope-intercept form

5.3 Slope-intercept form
Identify slope and y-intercept of the
graph & graph an equation in slopeintercept form.
day 1
Linear equation:
y-intercept:
An equation that models a linear function.
1. The y-coordinate of a point where the
graph crosses the y-axis. 2. where x= 0
Find the y-intercept:
y-intercept:
(0,2) or 2
y-intercept:
(0, -3) or -3
y-intercept:
(0,0) or 0
Slope-intercept form of a linear equation:
y = mx + b
slope
y-intercept
Identify the slope and y-intercept.
y = -2x + 3
= -2
y-int or b = 3
m
y = 6x
y = mx + b
y =6x+ 0
= 6
y-int or b = 0
m
y=5
y = mx + b
y = 0x + 5
m
= 0
y-int or b = 5
Write an equation in slope-intercept form given the slope
(m) and y-intercept (b).
m=2
b = -3
2
3
m =
b =7
y = mx + b
y = mx + b
y = 2x - 3
2
3
𝑦=
x+7
Write an equation given the graph of a line.
y = mx + b
1. Find 2 points on the line
2. Identify:
m=
3
4
b= 1
3. Write your equation:
y = mx + b
𝑦=
3
x
4
+ 1
Write an equation given the graph of a line.
y = mx + b
1. Find 2 points on the line
2. identify:
m=
−2
1
b = -1
3. Write your
equation:
y = mx + b
𝑦 = −2x - 1
= -2
Assignment: page 312:
7-21, 63-64,66, and 74-77
For 7-15: use m = for slope and b = for yintercept
7) y = 3x + 1; m =
b=