Question

Find the equation of the line passing through the point (9,-1)and parallel to the line 3x+y=7

Answer 1

ok so the parallel line must have the same slope, which in this case would be -3. We can see that because if we rearrange the equation, we get y = 7-3x.

Then we know that the new line must have the form y=-3x+b. To find b, all you got to see if there is a point given to you, which you know for sure will be contained in the line. So plug in y = -1 and x=9. Can you do the rest?

Answer 2

I finished solving the problem. Thank you for your help!