Question

Which situations can be represented by a linear function?

Select each correct answer.

Every day, the number of bacteria in the dish is 3 times what it was the previous day.

Every year, Luisa puts $10 into her savings account.

A country's population increases by 0.8% each year.

The barrel leaks 0.5 L of water each day.

Answer 1

The barrel leaks 0.5 L of water each day.

Every year, Luisa puts $10 into her savings account.

Answer 2

A linear function is when a variable y varies directly with a variable x. That is, when y increases, x also increases and the opposite is also true. THerefore, the correct answer from the choices listed above is the first option. Every day, the number of bacteria in the dish is 3 times what it was the previous day can be represented by a linear function.