Answer:
Your answer is 15 which is your rate of change/slope
Step-by-step explanation:
To calculate rate of change/slope which also means the gradient we need any two points from the figure for the formula
[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]
I took the points (2,30) and (4,60)
so we put the values in our formula
[tex]m=\frac{60-30}{4-2}[/tex]
[tex]m=\frac{30}{2} \\m=15[/tex]
