On a coordinate plane, a graph has number of hours on the x-axis and number of haircuts on the y-axis. A line goes through points (2, 1), (4, 2), and (6, 3).
The graph represents the number of haircuts, y, a hair stylist can give over time, x. Use the graph to find the constant of proportionality and write an equation.

The constant of proportionality is .
The equation that represents the number of haircuts the stylist can give in an hour is .