Let
f(x)=5 ·x2+2 ·x−3 and let x0= 1.
The instantaneous rate of change of f at x= 1 equals ?
Since this has been posted in the Pre-Calculus section, I doubt that the OP knows what a derivative is, or how to calculate it.
I would say at a Pre-Calculus level, it is enough to evaluate the difference quotient with a small change in $\displaystyle x$, say $\displaystyle 0.01$.
$\displaystyle \frac{f(1.01) - f(1)}{1.01 - 1} = $?