An indoor soccer field can be rented for personal use. The total cost for renting the field can be found by using the equation y = 225x. The x-variable is the number of hours the field is being rented, and the y-variable is the total cost, in dollars.
Which statement is true based on the given equation?
a The equation shows a linear relationship, but not a proportional relationship.
b The equation shows a linear relationship and a proportional relationship.
c The equation does not show a linear relationship or a proportional relationship.
d The equation shows a proportional relationship, but not a linear relationship.