On the graph given,
[tex]\begin{gathered} \text{Where} \\ x=0,y=0 \\ x=3,y=90 \\ (x_1,y_1)=(0,0) \\ (x_2,y_2)=(3,90) \end{gathered}[/tex]To find the robot's speed below, using change of slope (m) formula,
[tex]\text{speed, m, =}\frac{y_2-y_1}{x_2-x_1}=\frac{90-0}{3-0}=\frac{90}{3}=30\text{ ft per min}[/tex]A is the answer
