Final answer:
The equation that represents the relationship between the number of hours parked and the cost in dollars is c = h * r, where c is the cost in dollars, h is the number of hours parked, and r is the hourly parking rate.
Step-by-step explanation:
The equation that represents the relationship between the number of hours parked and the cost in dollars is c = h * r, where c is the cost in dollars, h is the number of hours parked, and r is the hourly parking rate.
Since Alexandra paid $7 to park her car for 3 hours, we can substitute c = 7 and h = 3 into the equation to solve for r.
7 = 3 * r
7/3 = r
.
So, the equation that represents the relationship between the number of hours parked and the cost in dollars is c = (7/3)h