Examples

Find the Equation with a Point and y-Intercept
(-3,1) , 8
Step 1
Find the value of m using the formula for the equation of a line.
y=mx+b
Step 2
Substitute the value of b into the equation.
y=mx+8
Step 3
Substitute the value of x into the equation.
y=m(-3)+8
Step 4
Substitute the value of y into the equation.
1=m(-3)+8
Step 5
Find the value of m.
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Step 5.1
Rewrite the equation as m(-3)+8=1.
m(-3)+8=1
Step 5.2
Move -3 to the left of m.
-3m+8=1
Step 5.3
Move all terms not containing m to the right side of the equation.
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Step 5.3.1
Subtract 8 from both sides of the equation.
-3m=1-8
Step 5.3.2
Subtract 8 from 1.
-3m=-7
-3m=-7
Step 5.4
Divide each term in -3m=-7 by -3 and simplify.
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Step 5.4.1
Divide each term in -3m=-7 by -3.
-3m-3=-7-3
Step 5.4.2
Simplify the left side.
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Step 5.4.2.1
Cancel the common factor of -3.
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Step 5.4.2.1.1
Cancel the common factor.
-3m-3=-7-3
Step 5.4.2.1.2
Divide m by 1.
m=-7-3
m=-7-3
m=-7-3
Step 5.4.3
Simplify the right side.
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Step 5.4.3.1
Dividing two negative values results in a positive value.
m=73
m=73
m=73
m=73
Step 6
Now that the values of m (slope) and b (y-intercept) are known, substitute them into y=mx+b to find the equation of the line.
y=73x+8
Step 7
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 [x2  12  π  xdx ] 
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