It has to do with finding a value in between numbers

Question

I need your help in finding the value in a problem I am working on.

It's for chemistry, and it has a lot to do with math. I must find the estimated angle measure when t = 32 minutes. I have an angle of 15.9 when t = 30 minutes and an angle of 14.6 when t = 35 minutes.

I know the value of t = 32 minutes is somewhere in between 14.6 and 15.9, but I don't know how to mathematically approach doing this.

Would you be able to help me in finding this estimate?

Answer 1

in 5 minutes the angle decreases by 0.7

in 2 minutes it decreases by .4 x .7 = .28

decrease 15.9 by .28 = 15.62 = 15.6 when t = 32