First we must know 40 percent is equal to 0.4
Since sales were up 40 percent in addition to the 100 percent it must have originally we can mustiply 300,000 by 1.4,
After doing this operation the correct anser is 420000
Since they are starting with 270, the y intercept is going to be 270, now since they are losing 15 food everyday, the slope is going to be -15 so the final equation is y=-15x+270
Step by step explanation:
Hope this helps