For A, the y coordinate does represent the total cost of electricity for 4 hours. If you see the corresponding numbers on the chart, they both work. As for B, I used a proportional relationship with A to calculate if B works. Work: $120/4 hours. Divide both sides by 4 and u get $30 per hour, which means B is incorrect. C is incorrect because the answer is A.
<span>B is the correct answer. The reaper and barbed wire were not invented to help colonists and Native Americans live peacefully; the barbed wire was created to help cattle ranges keep their animals penned.</span>
