SOLUTION: Hi, I do not know how to enter the following problems in order to solve and graph. write the equation of each line passing through the given pair of points (proble

Algebra ->  Linear-equations -> SOLUTION: Hi, I do not know how to enter the following problems in order to solve and graph. write the equation of each line passing through the given pair of points (proble      Log On


   

Question 431474: Hi,
I do not know how to enter the following problems in order to solve and graph.




write the equation of each line passing through the given pair of points

(problem #38)
(-4,2) and (8,7)
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
The formula to use is
+%28y+-+2%29%2F%28x+-+%28-4%29%29+=+%287+-+2%29%2F%288+-+%28-4%29%29+
+%28y+-+2%29+%2F+%28x+%2B+4%29+=5%2F12+
Multiply both sides by +12%2A%28x%2B4%29+
12%2A%28y+-+2%29+=+5%2A%28x+%2B+4%29+
+12y+-+24+=+5x+%2B+20+
+12y+=+5x+%2B+44+
+y+=+%285%2F12%29%2Ax+%2B+11%2F3+
check the answer:
(-4,2)
+2+=+%285%2F12%29%2A%28-4%29+%2B+11%2F3+
+2+=+-5%2F3+%2B+11%2F3+
+2+=+6%2F3+
2+=+2
OK
You can check (8,7)
Here's the graph:
+graph%28+400%2C+400%2C+-10%2C+10%2C+-10%2C+10%2C+%285%2F12%29%2Ax+%2B+11%2F3%29+