Construct and Interpret Linear Functions Practice Test

A plant is $12$ cm tall at week $0$ and $27$ cm tall at week $3$. Let $t$ be the number of weeks and let $h$ be the height (in cm).

Which linear function models the plant’s height, and what do $m$ and $b$ represent?

A student saves money each week. She starts with $\$40$ and saves $$15$ per week. Let $w$ be the number of weeks and let $S$ be the total savings (in dollars).

Which function models this situation, and what do $m$ and $b$ mean?