The graph shows the number of hours that Tammy spends typing for work, x, and the amount of pay that she earns, y. A graph titled Tammy's Pay with number of hours on the x-axis and pay in dollars on the y-axis. A line goes through points (2, 18) and (8, 42). What does the y-intercept represent? Tammy initially had $10 pay. Tammy will type for 10 minutes each day. Tammy initially had $4 pay. Tammy will type for 4 minutes each day.