A special type of equation that shows the relationship between different variables.

Example: The formula for the volume of a box is

Which has these variables:

• V stands for volume,

• l for length.

• w for width,

• h for height,

When l=10, w=5 and h=4, then V = 10 × 5 × 4 = 200

Example: The formula for the volume of a box is

**V = l × w × h**Which has these variables:

• V stands for volume,

• l for length.

• w for width,

• h for height,

When l=10, w=5 and h=4, then V = 10 × 5 × 4 = 200

See: Variable