Question

# Write an equation for this relationship.

- y = 18x
- y = 18.50x
- y = 22.50x
- y = 22x

Hint:

### When one variable increases in increasing the other variable, then they are in direct variation.

## The correct answer is: y = 18.50x

### Y=kx

Equation is total cost divided by days.

y = 18.50x.

Hence, the correct option is C.

The ratio of the variables is constant for a direct variation.

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