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Rate of Change

direct variation when two variables are related in such a way that the ratio of their values always remain the same
negative slope if the line goes down and to the right on a graph
no/zero slope (y = #) is a horizontal line because there is no change in the y value
rate of change tells how fast one variable changes compared with the other
slope (positive/negative) A measure of steepness of a straight line; graphically positive goes up and to the right; graphically negative goes down and to the right
undefined slope (x = #) is vertical line because there is 0 change in the x value
y-intercept where the line or parabola crosses the y-axis
_x indicates change in the domain
_y indicates change in the vertical axis
Created by: aprilchauvette