Directly Proportional Graph Example. When we put gas in our car there is a relationship between the number of gallons of fuel that we put in the tank and the amount of money we will have to pay. They can be expressed as fracx_1y_1 fracx_2y_2 Example.
We can write this formula as C kS. Dont confuse it with the symbol for infinity Example. The circumference of a circle is directly proportional to its diameter with the constant of proportionality equal to π.
When a directly proportional relationship is graphed the result is a linear graph with slope k and y-intercept at the origin.
How much you earn is directly proportionalto how many hours you work. Two variables are called inversely proportional if and only if the variables are directly proportional to the reciprocal of each other. How much you earn is directly proportionalto how many hours you work. Now were going to consider an example of proportional relationship in our everyday life.
