Carl puts 1.10$ in his penny bank every day in the month of july (31 days). his total savings was 55.00$ at the end of june. what is the best estimate for carl's savings at the end of july? (no i did not make a typo)

y = i/2 xtnop + (3i/2 tnop+ 1)

step-by-step explanation:

the picture is the step by step explanation.

the functions have the same rate of change i think. i narrowed it down to this answer and "the rate of change of tour 1 is greater" but i got it wrong using that answer so im assuming its the answer above. (this is a question i also answered from the iready site if anyone needs a reference)