Boykells: Which function increases by 1/3 every time the x- increases by 1?
A) y=3^x
B) y=3x+1
C) y=(1/3)^x
D) y=1/3x+1
This would mean that the slope (gradient) was always the same, which means that it must be a straight line.
The gradient is rise/run = 1/3 divided by 1
So what is 1/3 divided by 1?
The formula for a line is y=mx+b
b is the y intercept and it has nothing to do with the slope.
m is the gradient.
This should be enough hints. See if you can work it out.
+118613 
