Calculating upper and lower limits for a linear function
I am asked to calculate the lower limit and upper limit (L5 and U5) for the linear function y=13-3x, between x=0 and x=4.
I have found that Δx=4/5, and that x0 =0. However, I am getting my answers wrong when calculating x1, x2, ... x5.
For example, I tried to calculate x1 by doing n/2 = 1/2, however this is incorrect.
Any help would be greatly appreciated. Thank you!