SOLUTION: http://172.85.76.59/Library/00001211_46_2023_A1.png (Link above, thanks!)

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Question 1029641: http://172.85.76.59/Library/00001211_46_2023_A1.png
(Link above, thanks!)
Answer by EdenWolf(517) About Me  (Show Source):
You can put this solution on YOUR website!
Linked image:

Find the equation of the line passing through the points (3,1) and (7,-7).
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WORK:
First, we need to find the slope (m) of the equation. The formula to find the slope is m=%28y2-y1%29%2F%28x2-x1%29.
Plug in the numbers into the formula.
m=%28-7-1%29%2F%287-3%29
Which simplifies to...
m=-8%2F4
Which is...
m=-2
So now we have the slope. Our equation looks like this so far: y=-2x%2Bb
Now we must find b, which is the y-intercept.
We can choose one of our points and plug in their x and y values into our current equation. Then, we can solve for b.
Let's use (3,1).
1=-2%2A3%2Bb
Solve for b.
Multiply -2 and 3...
1=-6%2Bb
Add 6 to both sides...
7=b or b=7.
Now just plug in 7 for b in our equation.
ANSWER: y=-2x%2B7