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An object moves at a constant rate. The graph shows the object's height at different times. Which equation represents the situation?
A. y = −15x 900
b. y = −15x − 900
c. y = 15x − 900
d. y = 15x 900

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bellbell252
d. y = 15x 900

Although you do not give the rates I assume the answer is D as it is the only positive multiplication. You cannot have negative height.
The correct answer is 
(A) y=-15x+900

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