how can I calculate y=mx+b graphs

The graphs below show the profit, y, of the competitor over the past 16 months. Both graphs show the same information.

Graph A and Graph B both titled profit of competitor have X-axis labeled Months and Y-axis labeled profit in thousands of dollars. Graph A begins from (0, 11) and goes right and slightly up. Graph B begins from (0, 13) and goes right and upward.
Complete the following sentences.

To emphasize the slow increase in profits, it would be best for Bradley to use ___
for his presentation

Bradley should use this graph for his presentation because the profit
___ on this graph.

To emphasize the slow increase in profits, it would be best for Bradley to use Graph A for his presentation.

Bradley should use this graph for his presentation because the profit gradually increases on this graph.