So if you look at the graph, we go from
(0,0) to (10,40) so let x1=0, y1=0, x2=10 and y2=40
Remember that the slope m is the following
(y2-y1)/(x2-x1) substituting we have
(40-0)/(10-0)= 40/10=4
So the slope of the graph is 4. Now we are given that the other equation y=3.75x has slope 3.75. Store A is the one shown in the graph and we know that the graph has a slope 4 which is greater than store B. Therefore store A made a greater profit per T-shirt. You have to make sure to read carefully which store represents the graph and which represents the equation.
So the answer is A. Hope this helps!
