Option D is correct
Here, we want to select the correct statement from the options
A. This is not correct as both can result in a linear graph
B.This is not correct as the graphs will intersect at a point
C. This is not correct as we have some numbers of pencils in which the cost from T will be more expensive
D. This is correct
To know the company with the least expensive option, we need to know the numbers of pencils bought so we can comapre