Pre-Algebra Examples

Find the Equation Using Point-Slope Formula (-8,-6) , (-6,8)
,
Step 1
Find the slope of the line between and using , which is the change of over the change of .
Tap for more steps...
Step 1.1
Slope is equal to the change in over the change in , or rise over run.
Step 1.2
The change in is equal to the difference in x-coordinates (also called run), and the change in is equal to the difference in y-coordinates (also called rise).
Step 1.3
Substitute in the values of and into the equation to find the slope.
Step 1.4
Simplify.
Tap for more steps...
Step 1.4.1
Reduce the expression by cancelling the common factors.
Tap for more steps...
Step 1.4.1.1
Cancel the common factor of and .
Tap for more steps...
Step 1.4.1.1.1
Rewrite as .
Step 1.4.1.1.2
Factor out of .
Step 1.4.1.1.3
Reorder terms.
Step 1.4.1.1.4
Factor out of .
Step 1.4.1.1.5
Cancel the common factors.
Tap for more steps...
Step 1.4.1.1.5.1
Factor out of .
Step 1.4.1.1.5.2
Factor out of .
Step 1.4.1.1.5.3
Factor out of .
Step 1.4.1.1.5.4
Cancel the common factor.
Step 1.4.1.1.5.5
Rewrite the expression.
Step 1.4.1.2
Subtract from .
Step 1.4.2
Simplify the denominator.
Tap for more steps...
Step 1.4.2.1
Multiply by .
Step 1.4.2.2
Add and .
Step 1.4.3
Simplify the expression.
Tap for more steps...
Step 1.4.3.1
Multiply by .
Step 1.4.3.2
Divide by .
Step 2
Use the slope and a given point to substitute for and in the point-slope form , which is derived from the slope equation .
Step 3
Simplify the equation and keep it in point-slope form.
Step 4
Solve for .
Tap for more steps...
Step 4.1
Simplify .
Tap for more steps...
Step 4.1.1
Rewrite.
Step 4.1.2
Simplify by adding zeros.
Step 4.1.3
Apply the distributive property.
Step 4.1.4
Multiply by .
Step 4.2
Move all terms not containing to the right side of the equation.
Tap for more steps...
Step 4.2.1
Subtract from both sides of the equation.
Step 4.2.2
Subtract from .
Step 5
List the equation in different forms.
Slope-intercept form:
Point-slope form:
Step 6