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Researchers are comparing measurements of different trees. They record the height of each tree above ground level and the depth of the roots of each tree below ground level. Which pair of measurements represents a tree that is 18 feet tall with roots that extend 7 feet below ground level?

A 18, 7

B 18, –7

C –18, 7

D –18, –7

Question

first one to help gets medal and fan

Researchers are comparing measurements of different trees. They record the height of each tree above ground level and the depth of the roots of each tree below ground level. Which pair of measurements represents a tree that is 18 feet tall with roots that extend 7 feet below ground level?

A 18, 7

B 18, –7 

C  –18, 7

D  –18, –7

aveline · Answer

The height of the tree is equal to x and the measure of the roots is equal to y.
If the height is 18, x=18. If the depth of the roots is 7 feet below ground level, y=-7