Answer:
I think its B
Step-by-step explanation:
It's 0.60 per refill, so 0.60 is the slope, so there's a 0.60 x in the equation.
It starts at 4 when x=0; that's a y intercept of 4.
The equation is y = 0.60 x + 4
Answer: C. y = 0.60 x + 4
