Miguel volunteers at his local food pantry and takes note of how much money is donated each day during a 10-day fundraising phone-a-thon. Below is the graph that represents the data that he collected. A graph titled Food Pantry Donations has number of days on the x-axis and dollars donated on the y-axis. A line goes through points (1, 75) and (2, 100).

The slope of the line that represents the data that Miguel collected is 25, and the y-intercept is 50. What do the slope and y-intercept represent in Miguel’s situation?