SOLUTION: A line passing through (4, 20) and (6, y) is parallel to a line with slope –7. What is the value of y?

Algebra ->  Graphs -> SOLUTION: A line passing through (4, 20) and (6, y) is parallel to a line with slope –7. What is the value of y?      Log On


   

Question 111435: A line passing through (4, 20) and (6, y) is parallel to a line with slope –7. What is the value of y?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Slope=%28y%5B2%5D-y%5B1%5D%29%2F%28x%5B2%5D-x%5B1%5D%29 Start with the given slope formula

-7=%28y-20%29%2F%286-4%29 Plug in the given info


-7=%28y-20%29%2F2 Subtract


-14=y-20 Multiply both sides by 2


6=y Add 20 to both sides


So our answer is y=6