Please help! multiple choice! will give brainliest!

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

Adriana sold 50 shares of a company’s stock through a broker. the price per share on that day was $22.98. the broker charged her a 0.75% commission. what was adriana’s real return after deducting the broker’s commission? a. $8.62 b. $229.80 c. $1,140.38 d. $1,149.00

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)