Benjamin invested $39,000 in an account paying an interest rate of 2.1% compounded daily. Assuming no deposits or withdrawals are made, how long would
it take, to the nearest tenth of a year, for the value of the account to reach $54,200?

Ifound this on google “that means that the graph of a function with direct variation has these features: it is a straight line: because the slope is the ratio y/x = k. it passes through the origin (0,0): because y = kx = k (0) = 0.” i hope this you for what your looking for