Proportional Relationships, Slope, and Y-Intercepts

Front

What is a proportional relationship?

Back

A proportional relationship is a relationship between two quantities where the ratio of one quantity to the other is constant.

Front

What does the slope of a line represent?

Back

The slope of a line represents the rate of change of the dependent variable with respect to the independent variable.

Front

How do you determine if a slope is positive, negative, zero, or undefined?

Back

A slope is positive if the line rises from left to right, negative if it falls, zero if it is horizontal, and undefined if it is vertical.

Front

What is the formula for finding the slope (m) between two points (x1, y1) and (x2, y2)?

Back

m = (y2 - y1) / (x2 - x1)