In order to solve this you just need to evaluate the options given with the values of the point that is given in order to see if that point is a possibility in that function, remember to use the value of x to avaluate and if the result is the same as the points value for y then that poin is part of the graph.
Remember that when elevating to negative numbers the ecponent becomes a numerator, so the only option that is correct would be the first one
The best estimate of the population mean is the sample mean
first calculate the sum of all samples: 32+24+14+34+26+27+31+16+18+26=248 then divide by the amount of samples to get the samples mean: 248/10=24.8 miles per gallon