#### Examples - Variation Word Problems

# Directly Proportional Variation Word Problem Solver: Example

## See Other Variation Word Problem Examples solved by the Algebra Word Problem Solver.

- Solving Variation Word Problems
- Solving Inverse Variation Word Problems
- Solving Variation Word Problems - Varies as the Square

###### What You Enter

### y varies directly proportional to x. y=3 when x=25. Find y when x= 7.

###### What You Get

Y = kX Direct Variation Statement 3 = k * 25 // Y = 3 WHEN X = 25 . Substitute values. 3 k = ---- // Constant of Proportionality 25 3 k = --- // Constant of Proportionality 25 3 Y = ----X // Y as a Function of 25 Y = (3 / 25 ) 7 // X = 7 . Substitute value. Y = (21 / 25 ) // Y WHEN X = 7

Solution: Y = (21 / 25 )