Answer:
The equation is y=-100t + 8000 and you want machine B
Explanation:
A. Look at where the line crosses the y-axis, it is at 8000 so your y-intercept (b) is 8000.
Calculate the slope: (0,8000), (80,0)
0-8000/80-0=-8000/80= -100 lb/minute
The equation is y=-100t + 8000
B. Since B grates cheese at 100 lbs./minute, and the other one grates it at it's slope of 80 lbs./minute, you would want the second machine, B
That means that there is