At what rate is a student's grade changing from 65 to 92?

Question

I do not know how to solve for rate of change and need help on this math problem.

Answer 1

increasing at a rate of (95-62)= 33 points per unit of time

if it took 3 weeks for grades to improve by 33 points

then they increased at the rate of 33/3= 11 points per week

= 11/7 = approximately 1.57 points daily