Answer: [tex]y = 85x[/tex]
Step-by-step explanation:
The function [tex]y = ax+b[/tex] has the rate of change [tex]a[/tex].
It's easy to see that the points [tex](0, 0)[/tex] and [tex](4, 300)[/tex] belong to the graph.
Solve this system of equations:
[tex]\left \{ {{0=0a+b} \atop {300=4x+b}} \right.[/tex]
[tex]\left \{ {{a=75} \atop {b=0}} \right.[/tex]
The rate of change of the graph is [tex]a = 75[/tex].
Only [tex]y=85x[/tex] has higher rate of change in the answer section.
