I am not sure how to go about solving this problem:
I know the derivative of $f$ would be $2x$ but I am not sure where to go from there. If anyone could help out that would be great. Thanks!
Edit: The answer is: $y = 2x - 1$ , see below for why.
EDIT: For this problem:
plugging in $x_1$ back into the function did not seem to yield the correct $y_1$ to use in the point slope formula according to the solution software I use:
I plugged in $x_1$ into the function $f(x)=3x^3$ to get 3 for $y_1$. So the final equation would be $y - 3 = 3(x-1)$ -> $y=3x$
I don't see any errors being made. what could be the issue?