Find the slope of the line that passes through (10, 1) and (5,2)

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

How can i differentiate this equation?

Change negative exponents to positive, then solve