In a graph, the constant of proportionality, also known as the slope or rate of change, is the ratio of the change in the y-coordinate (the dependent variable) to the change in the x-coordinate (the independent variable) of a linear equation. It is represented by the letter "k" in the equation y = kx + b, where y and x are the coordinates of the points on the graph, k is the constant of proportionality, and b is the y-intercept.

Grade 7

Rates And Proportional Relationships

7.RP.A.2.B