Questions on Algebra: Systems of Linear Equations answered by real tutors!

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Question 62338This question is from textbook algebra 1
: This question is from textbook algebra 1

Answer by 303795(562) About Me  (Show Source):
You can put this solution on YOUR website!
m+=+%28y2+-+y1%29%2F%28x2+-+x1%29
To simplify the calculations I am using (4,5) as (x1,y1) and (2,y) as (x2,y2)
2+=+%28y+-+5%29%2F%282+-+4%29
2+=+%28y+-+5%29%2F-2 Multiply both sides of the equation by -2.
-4+=+y+-+5 Add 5 to each side of the equation
1+=+y