Answer:
y(x) = 5x+10
Linear relationship between x and y
Explanation:
The initial cost, regardless of time, is $10. cost will then increase at a rate of $5 per hour that the boat is rented. Therefore, the cost (y) of renting a paddle boat for 'x' hours is:

There is a linear relationship between x and y, where 5 is the slope of the equation, 10 is the y-intercept, the number of hours is the independent variable, and the cost is the dependent variable.