Asked by Johanna

Sketch a rough graph of the yield of a crop as a function of the amount of fertilizer used.

I do not know what to do, can someone guide me?
Answered by Steve
it could be a linear function

yield = k * fertilizer + some_minimal_yield

or it could be more complicated.
Answered by mayank
If
f(x) = 8 sec x − 5x, find f '(x).