Answer:
a) y = -2.812x + 97.554
b) the correlation coefficient is about -0.97, which is a strong linear fit.
Explanation:
you need a graphing calculator for linear regression, but desmos works fine :)
plugging in all the values into a table and letting the calculator do the work :D (attatched image)
the equation: y = -2.812x + 97.554
next, (also in the screenshot) the r-value, or the correlation coefficient, is about -0.97, and we want this to be as close to 1 or -1 as possible to get a perfect linear regression.
this is pretty close to -1, so i'd say that the linear fit is strong :)