A car salesperson kept data on cars he sold over the last few years. For each car he recorded the car's age (x) and car's selling price in $1,000 (y). The line of best fit is y=-1.8x+21.
Interpret the y-intercept in context.

Ascientist has discovered an organism that produces five offspring exactly one hour after its own birth, and then goes on to live for one week without producing any additional offspring. each replicated organism also replicates at the same rate. at hour one, there is one organism. at hour two, there are five more organisms. how many total organisms are there at hour seven? 2,801 19,531 19,607 97.655