Graph interpretation word problems

Match features of graphs of modeling functions to their real-world meaning.

Problem

The efficiency of a motor can be measured by the percentage of the input power that the motor actually puts to use.
Let E, left parenthesis, c, right parenthesis denote the efficiency E of a given motor (measured in percentage points) as a function of the power input's current c (measured in amperes). The function is graphed below.
The following table contains true statements. Match each statement with the feature on the graph that most closely corresponds to it.
Feature
Statement
  • x-intercept
  • Relative maximum or minimum
  • Increasing or decreasing interval
  • As the input power's current grows beyond 1 ampere, the motor becomes less efficient.
  • At its most efficient, the motor uses about 50, percent of the input power.
  • The motor loses all efficiency when the current hits 3 amperes.