If you think of slope as a ratio of the change in the y value for a unit increase in the x value, then you can use the equation to calculate...if x = 1, y = 3(1) - 2 or y = 1if x = 2, y = 3(2) - 2 or y = 4The y values increased by 3 three units as x increased by one unit. The slope is 3.