Examples

Find the Equation Using Point-Slope Formula
(-7,-1) , m=2
Step 1
Use the slope 2 and a given point (-7,-1) to substitute for x1 and y1 in the point-slope form y-y1=m(x-x1), which is derived from the slope equation m=y2-y1x2-x1.
y-(-1)=2(x-(-7))
Step 2
Simplify the equation and keep it in point-slope form.
y+1=2(x+7)
Step 3
Solve for y.
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Step 3.1
Simplify 2(x+7).
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Step 3.1.1
Rewrite.
y+1=0+0+2(x+7)
Step 3.1.2
Simplify by adding zeros.
y+1=2(x+7)
Step 3.1.3
Apply the distributive property.
y+1=2x+27
Step 3.1.4
Multiply 2 by 7.
y+1=2x+14
y+1=2x+14
Step 3.2
Move all terms not containing y to the right side of the equation.
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Step 3.2.1
Subtract 1 from both sides of the equation.
y=2x+14-1
Step 3.2.2
Subtract 1 from 14.
y=2x+13
y=2x+13
y=2x+13
Step 4
List the equation in different forms.
Slope-intercept form:
y=2x+13
Point-slope form:
y+1=2(x+7)
Step 5
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 [x2  12  π  xdx ] 
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