A sapling, or young tree, is planted in a garden. After 3 years, it is 180 cm tall. After 7 years, it is 368 cm tall. How tall will the tree be after 10 years?
A. 587cm
B. 548cm
C. 509cm
D. 470cm

Question

A sapling, or young tree, is planted in a garden. After 3 years, it is 180 cm tall. After 7 years, it is 368 cm tall. How tall will the tree be after 10 years?
A. 587cm
B. 548cm
C. 509cm
D. 470cm

anonymous · Answer

@amistre64

anonymous · Answer

please help

amistre64 · Answer

we have 2 points of reference, can we assume a linear model?

amistre64 · Answer

in 4 years it grew (368-180) cm

if its a linear model,  then we can assume in 1 year it grew (368-180)/4  cm

after 7 years, it grew for 3 more years .... add up the growth spurts

anonymous · Answer

i dont understand

amistre64 · Answer

if we know how far the tree grows in 1 year,  then we simply add 3 years to the 7year height.

amistre64 · Answer

how far did it grow in 4 years?  from 180 to 368

divide the difference by 4 to get how far it grows in 1 year.

amistre64 · Answer

we know how tall it is at 7 years"

7 + 1 + 1 + 1 = 10,  so all we do is add up the growth spurts for 3 years and add it to the height of the tree in its 7th year