(-2,3) , (1,-9)
Find the value of the slope.
Slope is equal to the change in y over the change in x, or rise over run.
m=change in ychange in x
The change in x is equal to the difference in x-coordinates (also called run), and the change in y is equal to the difference in y-coordinates (also called rise).
Substitute in the values of x and y into the equation to find the slope.
Simplify the numerator.
Multiply -1 by 3.
Subtract 3 from -9.
Simplify the denominator.
Multiply -1 by -2.
Add 1 and 2.
Divide -12 by 3.
Find the value of the y-intercept.
Substitute the value of m into the slope-intercept form of the equation, y=mx+b.
Substitute the value of x into the slope-intercept form of the equation, y=mx+b.
Substitute the value of y into the slope-intercept form of the equation, y=mx+b.
Rewrite the equation as (-4)⋅(-2)+b=3.
Multiply -4 by -2.
Move all terms not containing b to the right side of the equation.
Subtract 8 from both sides of the equation.
Subtract 8 from 3.
The values of the slope and y-intercept are m=-4 and b=-5.
Find the Slope and Y-Intercept (-2,3) , (1,-9)