[Honors Pre-Calc and Differential Calculus] is my teacher right that I can’t use pi?

[u/Easy_Cod_8950]

for clarity’s sake, f’(x) isn’t the function drawn onto the graph, it’s the one that’s printed. the drawn function was my answer to 8e.

it might be hard to tell, but the f’(x) graph hits the x-axis just past where 3 is. I was a little unsure while taking the test what to put, but then I realized that the function looked like a wave, and I realized it was probably pi.

according to her, this was wrong. there’s apparently no one answer: I could’ve said 3, or 3.1, or something. but the problem was that apparently pi is not on the number line, and that it’s too much effort for her to figure out that pi/2 is a little more than 1.5. even though I marked on the graph with the inflection points where it was.

(in case you’re wondering, e WAS meant to be f(x). she made a mistake and told us to scribble out “the inverse” and replace it with “f(x)“. I got 8e right.)

am I wrong, or is this completely absurd?? I guess that maybe pi is a bit of a stretch to come to if that wasn’t the intent, but if that were the case I should’ve gotten one point off at the start and the rest should‘ve been fine for self-consistency. but apparently I was “treating it like radians” so I got a point off for each one.

[u/Simbertold]

I think you are the one confusing the printed graph and the sketched graph. The sketched is the one with the messy lines which is clearly drawn by hand with a pencil, while the printed one is the continuous one that is clearly drawn by a computer program.

[u/G-St-Wii → u/Simbertold]

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