Yes its proportional, I mean number of hours and earned dollars. ITs because if she stay at work 2 times more she will earn 2 times more. Proportional is relation where is 1 is growing second is growing too. In mathematical point of view proportionality is when there is no variable taken to the power of 2 or something else, and if there is no situation shown in example below y = x 2 - its not proportional Because if x is getting greater, RHS is going to be smaller, so y is going to be smaller when x is growing.
The equation y=7.5x, which describes the amount a babysitter earns (y), being a product of the number of hours worked (x), represents a proportional relationship because there is a constant rate of change. This means that for every hour the babysitter works, they earn a fixed amount of $7.5. Since there is no initial fee or starting value other than zero, the babysitter's earnings are directly proportional to the hours worked.
The babysitter's earnings are proportional to the number of hours worked, as represented by the equation y = 7.5 x . This relationship means that if the hours increase, the earnings increase by the same factor. The constant of proportionality is 7.5, indicating that for every hour worked, the earnings increase by $7.50.
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