Dr Adams is a botanist. she measures the daily height of a particular of sunflower is 60 days old. at 60 days, the height of the sunflower is 205 centimeters. Dr Adams finds that the growth rate of this sunflower is 2 centimeters per day after the first 60 days. how many day does it take for the sunflower to reach 235 centimeter

Lets write a linear equation to represent this flower growth, lets call y the height of the flower in centimeters and x the number of days passed:

y = 205 + 2x

that means that the flower height y, will grow 2 centimeterrs each x days.

So if we have 235 cm height, we can find the amount of days needed if we replace in the equation and solve for x:

y = 205 + 2x

235 = 205 + 2x

2x = 235 - 205

2x = 30

x = 15

therefore the flower needs 15 days to reach 235 cm height