You can see the slope of the line for cost per pound of cherries is greater, or in other words the line is more steep and traveling higher faster. Therefore, we know that the cost per pound of cherries is greater than that of apples because the cost increases more with each pound.
We just have to multiply 20 by 10mm, which is 200mm. 100mm is equal to one centimeter, so the body length of the insect under the microscope is two centimeters.