If a parking garage charges $5.50 to park for 4 hours and $7.75 to park for 7 hours. if the cost is a linear function of the number of hours parked, what is the cost to park for 3 hours?

7.75-5.5=2.25
7-4=3
2.25÷3=0.75
One hour is 0.75
three hours are 2.25

This is what i found “an explicit formula designates the nth term of the sequence, as an expression of n (where n = the term's location). it defines the sequence as a formula in terms of n. this example is an arithmetic sequence(the same number, 5, is added to each term to get to the next term).” i hope this you for what your looking for. can you plz mark me brainliest?