Ineed an answer for a and b question below

Find the slope of the line that contains the following points. r(-2, 4), s(6, -2)

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

David estimated he had about 20 fish in his pond. a year later, there were about 1.5 times as many fish. the year after that, the number of fish increased by a factor of 1.5 again. the number of fish is modeled by f(x)=20(1.5)^x. create a question you could ask that could be answered only by graphing or using a logarithm.