Astock was purchased at $15.75 per share and sold at $19.25 per share what was the profit per share

The profit per share can be solved by subtracting the amount that is initially paid to buy or purchased the share from the final amount when it was finally sold. From the given values above, the profit per share will be,
             profit per share = $19.25 - $15.75
                                         = $3.5
Thus, each share will gain $3.5. 

Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.