Can someone help me with this because i dont know how to do this

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

Colby and jaquan are growing bacteria in an experiment in a laboratory. colby starts with 50 bacteria in his culture and the number of bacteria doubles every 2 hours. jaquan starts with 80 of a different type of bacteria that doubles every 3 hours. let x equal number of days. colbys experiment follows the model: a.) y=50*2^x b.) y=50*2^8x c.) y=50*2^12x jaquans experiment follows the model: a.)80*2^x b.)80*2^8x c.)80*2^12x

What are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2