A marketing manager at a company that produces and sells cooking oils uses mathematical models to determine the prices
for the company's products. The graph below shows how the
weekly revenue is predicted to vary depending on the price set
for the smallest bottles of olive oil that the company sells.

what is the question here

step-by-step explanation:

you could deduce the conclusion directly using the facts pertaining to the specific situation.

hope this .

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.