SOLUTION: write an equation for the line that passes through (-4,8) and (3, -7). Where does the line intersect the x-axis?

Algebra ->  Linear-equations -> SOLUTION: write an equation for the line that passes through (-4,8) and (3, -7). Where does the line intersect the x-axis?      Log On


   

Question 1096709: write an equation for the line that passes through (-4,8) and (3, -7). Where does the line intersect the x-axis?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
slope %288-%28-7%29%29%2F%28-4-3%29=15%2F%28-7%29=-15%2F7
point-slope equation y-8=-%2815%2F7%29%28x%2B4%29

Solve equation for x.
%28y-8%29%28-7%2F15%29=x%2B4
x=-%287%2F5%29%28y-8%29-4
lety=0;
x=-%287%2F15%29%28-8%29-4
x=56%2F15-60%2F15
highlight%28x=-4%2F15%29


graph%28300%2C300%2C-3%2C3%2C-3%2C3%2C-%2815%2F7%29%28x%2B4%29%2B8%29