The table shows the height of a plant over time. Which type of function best models the data? Write an equation to model the data.

Question

year: 0 1 2 3 4
height (cm): 81 101 121 141 161

a. Quadratic; y = 20x^2 + 81
b. Exponential; y = 81 ∙ 20^x
c. Quadratic; y = 81x^2 + 20
d. Linear; y = 20x + 81

please help

Answer 1

goes up by 20 each step
starts at 81
20 x + 81

Answer 2

so its d. Linear; y = 20x + 81
thank you