Please explain how to setup and solve the word problem on savings. I thought using the rate of change would help jump start me getting to the correct answer(s), but my answers are incorrect. screenshot attached. Thank you for your help.

HW3.3 Score: 13.67126 15f26 answered l__l | x Question 25 v Score on last try: 0 of 1 pts. See Details for more. i > Next question I l 8 Try a similar question ' You can retry this question below The end of the seventh month this year, you have $335 saved. At the end of the ninth month this year, you have saved $357. What is your savings rate? Answer 2 dollars per month per month. How much did you have saved at the beginning of the year? Write an Quation to model this situation {use no for months and 3 for savings). 3:357+335(4) 3: Equation