Write an equation
m = 1/2
b= 0
y= 1/2x
How many quadrants are on a graph?
4
y= mx + b
Which variable is the slope?
m
Rise = 3
Run = 3
-2 + 3 = ?
1
m= 1
b= - 1
y= x - 1
Which axis is horizontal?
X-axis
y = mx + b
Which variable is the y-intercept?
b
Rise = 4
Run = 2
Slope = 2
4 + (-2) = ?
2
m= -3
b= - 1/3
y= -3x - 1/3
How do we find slope on a graph?
Calculate rise over run.
y = 1/2x + 3
What is the slope?
1/2
Rise = -5
Run = 1
Slope = -5
-2 + 4 = ?
2
m= - 4/5
b= 2
y= -4/5x + 2
What is the y-intercept?
The starting point or where the line crosses the y-axis.
y = 2x - 4
What is the y-intercept?
-4 or (0,-4)
Rise = 10
Run = 4
Slope = 5/2
-5 - 3 = ?
-8
m= 12
b= -2/3
y= 12x - 2/3
What makes a graph proportional?
It goes through the origin; (0,0).
3y = 9x - 12
What is the slope?
Rise = 4
Run = 6
Slope = 2/3
3 - (-7) = ?
10