What is b? What is b? What is B?

How to find the exponential function y=ca^x, with points (1,2) and (2,1)

The scatterplot represents the total fee for hours renting a bike. the line of best fit for the data is y = 6.855x + 10.215. which table shows the correct residual values for the data set?

Point q is equidistant from the sides of ∠tsr. find m∠rst.