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) plant height
3 15
5 25
7 35
9 45

a. y – 15 = (x – 3)
b. y – 15 = 5(x – 3)
c. y – 3 = (x – 15)
d. the relationship cannot be modeled.