music down loads cost .95 cents each . is this a proportional relationship?
No.
example
To determine if it is a proportional relationship, we need to compare the cost of different numbers of music downloads. A proportional relationship exists when the ratio between two quantities remains constant.
Let's compare the cost of 1 music download and the cost of 2 music downloads:
- 1 music download costs $0.95.
- 2 music downloads would cost $0.95 * 2 = $1.90.
If it were a proportional relationship, the ratio between the cost of 2 music downloads and the cost of 1 music download should be the same as the ratio between any other pair of quantities. In this case, the ratio is $1.90 / $0.95 = 2.
Since the ratio is not the same for all quantities of music downloads, we can conclude that the relationship between the cost and the number of music downloads is not proportional.