Question

Estimate the slope of the rate curve at certain point? (see attachment)

Answer 1

Okay so this problem has had a few different parts involving the graph, like finding the definite integral via Riemann sums, etc. The last question on the problem asks me to find the slope at t=12. Would that be the instantaneous rate? If so, what formula do I use to find the it at t=12? I'm not given the formula of the v(t) function, so I couldn't find the s(t) function either; all I have are the data points.