Answer:
c)
Step-by-step explanation:
For a function the value of the variable "x" must correspond to a single value of "y"
Hope this helps
Make 2 equations let x=150 y=600/180000 than plug and chug
(2,-2)(5,7)
7-(-2)= 9
5-2= 3
9/3= 3
slope = 3
(you could also calculate the slope by just counting up how many units it goes up/down when you pick a point from the x-axis and move left/right. basically counting the rise over run)