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29 votes
29 votes
There is a line that includes the point (4,8) and has a slope of 4 What is its equation in slope- intercept form

User Pallgeuer
by
2.5k points

1 Answer

10 votes
10 votes

Answer:

y=4x-8

Explanation:

1) The slope-intercept form of an equation looks like this:

y=mx+b

The m stands for the slope and the b stands for the y-intercept. We need two points on the line to write out this equation.

2)We have the slope you entered in, so we'll plug that in first:

y=4x+b

3) Now, let's plug in that point you entered in to solve for b:

​ y=4x+b

8=4(4)+b

8=16+b

8-(16)=b

-8=b

4) Now that we have both our slope, m, and our y-intercept, b, values, we can plug them in to get our equation:

y=mx+b

y=4x-8

User Timsterc
by
2.6k points
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