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Type: Multiple-Choice
Category: Functions and Relations
Level: Grade 9
Standards: HSF-LE.B.5
Author: nsharp1
Last Modified: 3 months ago

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Functions and Relations Question

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Grade 9 Functions and Relations CCSS: HSF-LE.B.5

A car is traveling at 15 mph, and then begins to accelerate. The function [math]v(t) = 15 + 9t[/math] models this, where [math]v[/math] measures the speed of the car in miles per hour, and [math]t[/math] is the time elapsed in seconds since the car started accelerating. How fast is the car accelerating?
  1. 15 mph/s
  2. 9 mph/s
  3. 24 mph/s
  4. It depends on how much time has elapsed.
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