Stuck on Calculus problem (over 50 attempts)

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So I have half of the question right. I’m pretty sure the expression 3.14 tends to is f(x)-f(π) / x- π
but the stupid webwork says it is wrong. For the final answer I got y to be equal to 0.22x – 1.09, also wrong. I’ve spent 4 days on this and I’ve given up so an answer will be very much appreciated