Question

Yesterday Chang planted 6 trees that were each 8 feet tall in his yard. Chang projects the trees to grow at the following annual rates over the next 5 years

Answer 1

Sugar Maple

8 + 1.5x = 15.5

Fraser Fir

8 + 0.25x = 9.25

Sycamore

8 + 2.5x = 12.5

Oak

8 + 4x = 28

It cannot be Red Maple or Linden, because they are multiplying the number of years by the height it already has. We are looking for the height it will have BASED on the rate that Chang calculated.

Therefore, we are multiplying the RATE by the NUMBER OF YEARS (x)

Explanation:

It cannot be red maple, because you are multiplying the height it already has, and not the rate it will grow by. The same goes for Linden.

The right expression to represent the growth of Red Maple would be

8 + 3x = 23

The right expression to represent the growth of Linden would be

8 + 1.5x = 15.5

Therefore, again, the correct answer(s) would be: Sugar Maple, Fraser Fir, Sycamore, and Oak.