SOLUTION: If a line has a slope of 3 and cuts the y axis at the point 7, what is its equation? Please help - struggling with working this out!!

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Question 469034: If a line has a slope of 3 and cuts the y axis at the point 7, what is its equation?
Please help - struggling with working this out!!
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
m= 3.00
y=mx+b
Find b
intercepts x axis at (7,0)

Plug value of the slope and point (7,0) in
Y = m x + b
0.00 = 21 + b
b= 0 21
b= -21
So the equation will be
Y = 3x -21
m.ananth@hotmail.ca