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2 September, 22:14

An exponential function is graphed in the xy‑plane. If the graph of the function is always decreasing and has a y‑intercept of 20, which of the following could be the function's equation?

A) y=-20 (1.75) ^x

B) y=20 (1.75) ^x

C) y=-20 (0.75) ^x

D) y=20 (0.75) ^x

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Answers (1)
  1. 2 September, 22:32
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    It's D. when x = 0, y = 20 and the base 0.75 < 1 so it's always decreasing.
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