A person invested $
420
$420 in an account growing at a rate allowing the money to double every 10 years. How long, to the nearest tenth of a year would it take for the value of the account to reach
$
960
$960?

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

What the heck i didn’t know

Ibelieve the answer is c i worked it out three times but if my answer is wrong someone correct me