SOLUTION: Find the equation of the line which passes through the points P(0,a) and Q(a,2a)

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Question 824661: Find the equation of the line which passes through the points P(0,a) and Q(a,2a)
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!
first find a slope:
Slope m+=+%28y1-y2%29%2F%28x1-x2%29
given: x1=0 and x2=a, y1=a and y2=2a,
m+=+%28a-2a%29%2F%280-a%29
m+=+%28-a%29%2F%28-a%29
m+=1
so,
y-intercept+=+a because is given point P(0,a), menas if x=0 => y=a
--> y+=+x+%2B+a