how do I solve this?

Question

74 5
66 6
81 8
52 11
73 12
62 15
52 16
45 17
62 18
46 18
60 19
46 20
38 20
y=31.934+(-0.304)x
An ecologist uses the line, based on 13 colonies, to predict how many new birds will join another colony, to which 71% of the adults from the previous year return. What is the prediction? (Round your answer up to the nearest whole number.)

Answer 1

IT APPEARS THAT YOU HAVE SOME DATA, X AND Y VALUES, AND THAT A LINEAR REGRESSION HAS BEEN PERFORMED, THE RESULTS OF WHICH ARE STATED AS THE FORMULA FOR y as a function of x.

 

One would like to have a better description of what x and y are, in order to use the formula for y.