A small tree was planted at a height of 9 feet. The tree has been planted for 16 months and is now 57 feet tall. Write an equation to find how much it grew each month.

Question

Mathematics

Lena

7 October, 03:24

A small tree was planted at a height of 9 feet. The tree has been planted for 16 months and is now 57 feet tall. Write an equation to find how much it grew each month.

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Answers (1)

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Rubi Gardner · Answer 1

First you have to know what x and y mean in the equation. They told you in the problem that x is the avg # of feet the tree grew each month. That means that the number multiplied by x is the number of months. Y will be the total height. That number is 57.6. When y = 57.6, the number that should be multiplied by x is 16. The tree starts at 8 ft tall, not 0 feet, so the y-intercept in this equation should be 8, because even when 0 months have passed, it will be 8 ft tall. So you know the equation will have the + 8 in it added to the slope times x part. It should be d. 16x + 8 = 57.6.