Need help finding the degrees of the 2 particular angles and the value of x and y. (please)

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days

Which equation represents the function on the graph?

Plot the intercepts to graph the equation