Louis used a quadratic equation to model the height, y , of a falling object x seconds after it is dropped. Which ordered pair generated by this model should be discarded because the values are unreasonable?
Answer
A
open paren 6 comma 0 close paren
B
open paren negative 4 comma 1 close paren
C
open paren 9 fourths comma 24 close paren
D
open paren 5 comma 3 halves close paren
Explanation
Since x represents the number of seconds after the object is dropped, it cannot be negative. The ordered pair (-4, 1) says the object was at height 1 before it was dropped, so it is unreasonable for this model. The other pairs have nonnegative times and heights.
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