Find y if the slope between (5,y) and (7,-9) is -4.

This is telling you that a line that cross the coordinates (5,y) and (7,-9) has a slope of -4.

To compute the slope, we use the formula rise over run. The rise is (y -(-9)) and the run is (5-7). Therefore, the slope formula is (y-(-9))/(5-7)=-4. Now we solve for y.

1. (y-(-9))/(5-7)=-4

2. Simplify...(y+9)/-2=-4

3. Multiply both sides by -2...y+9=8

4. Subtract 9 from both sides...and we get the answer -1.

5. Check the work by substituting -1 in the formula.

(-1+9)/(5-7)=-4

**This verifies that the answer is y=-1**.

## Comments

need a little help setting it up please thanks