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## Get ready for AP® Calculus

### Course: Get ready for AP® Calculus>Unit 5

Lesson 3: Interpreting features of graphs

# Graph interpretation word problems

## Problem

The efficiency of a motor can be measured by the percentage of the input power that the motor uses.
E, left parenthesis, c, right parenthesis models the efficiency (in percentage points) of a certain motor as a function of the power input's current c (in amperes).
Match each statement with the feature of the graph that most closely corresponds to it.
The first quadrant of a coordinate plane. The x-axis scales by zero point two-five and is labeled c for the power input's current in amperes. The y-axis scales by five and is labeled E of c for the efficiency in percentage points of a motor. The graph of the function is a continuous curve. From left to right, it starts at the x-intercept zero point four, zero and increases through the point zero point five, thirty and the point zero point seven-five, forty-eight until a local maximum at zero point nine, fifty where it stalls slightly. The function decreases from the point one, fifty through the point two, thirty to the x-intercept three, zero. All values are estimates.
Stuck?
Stuck?