Algebra Examples

Find the Equation with a Point and Slope
m=5 , (1,1)
Step 1
Find the value of b using the formula for the equation of a line.
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Step 1.1
Use the formula for the equation of a line to find b.
y=mx+b
Step 1.2
Substitute the value of m into the equation.
y=(5)x+b
Step 1.3
Substitute the value of x into the equation.
y=(5)(1)+b
Step 1.4
Substitute the value of y into the equation.
1=(5)(1)+b
Step 1.5
Find the value of b.
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Step 1.5.1
Rewrite the equation as (5)(1)+b=1.
(5)(1)+b=1
Step 1.5.2
Multiply 5 by 1.
5+b=1
Step 1.5.3
Move all terms not containing b to the right side of the equation.
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Step 1.5.3.1
Subtract 5 from both sides of the equation.
b=1-5
Step 1.5.3.2
Subtract 5 from 1.
b=-4
b=-4
b=-4
b=-4
Step 2
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=5x-4
Step 3
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