The map of a walking trails drawn on a coordinate grid with three points of interest. the trail starts at r-1,4 and goes to s5.4 and continues to ts-2

Suppose there is a simple index of three stocks, stock abc, stock xyz, and stock qrs. stock abc opens on day 1 with 4000 shares at $3.15 per share. stock xyz opens on day 1 with 5000 shares at $4.30 per share. stock qrs opens on day 1 with 6000 shares at $4.60 per share. the price of stock abc on day 8 begins at $3.50. the price of stock xyz on day 8 begins at $3.90. stock qrs opens on day 8 with a price of $4.50 per share. assume that each stock has the same number of shares that it opened with on day 1. what is the rate of change of this simple index over 1 week?

The graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.

Can some one explain this i got sent this. is this a threat i’m scared