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?

He should change how much he puts into his account each month to $50

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.