Question

The table shows the height of a plant as it grows. What equation in point-slope form gives the plant’s height at any time?

Let y stand for the height of the plant in cm and let x stand for the time in months.

Time (months): 3; Plant Height (cm): 9
Time (months): 5; Plant Height (cm): 15
Time (months): 7; Plant Height (cm): 21
Time (months): 9; Plant Height (cm): 27

Answer 1

9 ÷ 3 = 3
15 ÷ 5 = 3
21 ÷ 7 = 3
27 ÷ 9 = 3

y = 3x + 0