Answer:
BMobile has a lower cost after 2 months.
Step-by-step explanation:
First off the question states that it is only looking for the costs after two months, so any data before 2 moths can be eliminated.
Next lets looks at the slope of Bmobile's cellphone plan.
Starting from two months the cost is $90 and then for four months the cost is $110. The change in x (number of months) is 2 and the change in y (costs) is 20. Then using the slope formula rise over run (20/2) we now know the slope for BMobile's plan is $10 A MONTH, after 2 months.
Now for the slope of MyTalk, we can use coordinates since we are using a graph. The coordinates for two months will be (2,80) and for four months it is (4,130). The change in x is 2 and the change in y is 50. The slope would be "50/2" or 35. The monthly costs after 2 months is $35 a month.
This means that Bmobile has a lower monthly rate after 2 months. Hope I helped :)
