2b.) and please explain how you did it

Answer: Aaron
Step-by-step explanation:
2b is asking which slope is greater.
Choose two points for Ricky and two points for Aaron in order to find the rate of change (slope). Use the slope formula: [tex]m = \dfrac{y_2-y_1}{x_2-x_1}[/tex]
[tex]\text{Ricky:}\ (5, 50)\ and\ (0, 30)\qquad \qquad \text{Aaron:}\ (4, 30)\ and\ (0, 10) \\\\m=\dfrac{50-30}{5-0}\qquad \qquad \qquad \qquad \qquad m=\dfrac{30-10}{4-0}\\\\.\quad =\dfrac{20}{5}\qquad \qquad \qquad \qquad \qquad \qquad \quad =\dfrac{20}{4}\\\\.\quad =4\qquad \qquad \qquad \qquad \qquad \qquad \qquad =5\\\\[/tex]
Aaron has has a greater slope than Ricky