The marketing department at Cable TV (CTV) wants to know how promotional advertising affects the number of viewers for the Saturday Night Movie. Research shows that 10 million viewers watched the movie when CTV ran 15 one-minute ads on Friday. When they ran 25 one-minute ads on Friday, the movie had 17 million viewers. Use linear interpolation to estimate the number of viewers if CTV runs 22 one-minute ads on Friday.

What is your attempt?

What is your attempt?
What do you mean attempt? o.O

Your attempt at the problem.

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So, we first need to see where you are going wrong.