Find the equation of the line with the given properties
slope 1/2,y-intercept (0,5)
slope 3 passing through the point (2,2)
passing through the points (5,2) and (1,10)

Equation of a line
Y = mx + c

mx = gradient of a line.
c = Y Intercept

In order to calculate gradient is is the following :
m = Vertical distance / Horizontal distance.
These distances can be found out by drawing a line from any point on the line until it will line up with another part of the line at a definitive point, and then going up/down to this point.

Try use these to help you with your answer, you've worded it a bit weirdly..
If you have a picture of the graph I can figure it out easier.

Sorry i meant b in the other question