Question

Michelle buys a motorcycle for $10,000. The motorcycle loses 20% of its value each year. The depreciation of the motorcycle is shown by the graph. After how many years is the value of the motorcycle worth $6400?

Answer 1

we can do it without the graph, although i guess you are supposed to use it
do you have it?

Answer 2

in one year it is worth \(10,000\times .8=8,000\)
in two years it is worth \(8,000\times .8=6,400\) so we see the answer is in two years, even without the graph