Section: Math

20) A plant grows at a linear rate. After seven weeks, the plant is 56 centimeters tall. Which function best models the relationship between height (h) and weeks of growth (w)? 

1. h(w)=7w
2. h(w)=8w
3. h(w)=56w
4. h(w)=56+w

7*8 is 56, so we know that 8 will have to be a part of the function. Plug in 7 for w and Answer 2 is your correct answer.