The 2 in the 2/5 indicates the exponent and the 5 is the root so the ansewer is
5√ b^2
Its A
M or the slope has to be constant throughout the graph. This is because in order for a line to be linear it has to be increasing or decreasing at the same rate. So it the slope was 2 from point x 1 -2 then the slope changed to 1 from 3-4 it would not be linear. :)
