The constant value (often written

It is the ratio of the amounts y and x:

Put another way:

Example: you are paid $20 an hour

The constant of proportionality is 20 because: Pay = 20 × Hours worked

**k**) relating amounts that rise or fall uniformly together.It is the ratio of the amounts y and x:

**k = y/x**Put another way:

**y = kx**Example: you are paid $20 an hour

The constant of proportionality is 20 because: Pay = 20 × Hours worked

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