Chris has $100 in his savings account and he adds $20 a month to the account. the total amount can be represented by the linear function t = 20x + 100. his goal is to have a total of $300 in four more months. what should he change in the function to reach this goal? a) change the amount he adds each month to $50. b) change the amount he adds each month to $40. c) change the y-intercept of the linear function to $20. d) change the y-intercept of the linear function to $50.