Lesson 1.8 Interpreting Graphs of Functions

What is the x-intercept of a graph?

• The x-intercept of a graph is the point where the graph intersects the y-axis.

• The x-intercept of a graph is the point where the graph intersects the x-axis.

• The x-intercept of a graph is the highest point on the graph.

• The x-intercept of a graph is the point where the graph intersects the z-axis.

What is the y-intercept of a graph?

• The y-intercept is the point where the graph intersects the x-axis.

• The y-intercept is the point where the graph intersects the y-axis.

• The y-intercept is the highest point on the graph.

• The y-intercept is the slope of the graph.

Sarah tracked the value of her car in this graph.

What does the point (2005, 14500) represent?

• In 2005, her car was worth $14,500.

• Her car was worth $2,005.

• She bought the car for $14,500.

• Her car lost $2,005 in value from $14,500.

The temperatures in NYC were tracked in this graph.

What does the point (3, 50) represent?

• On the third day, it was 50 degrees F.

• It was only 3 degrees F on day 50.

• The temperature rose 3 degrees on day 50.

• None of these.

Russel's height is tracked in this graph. What does the point (12, 3) represent?

• Russel was 3 feet tall when he was 12 years old.

• Russel grew 3 inches when he was 12 years old.

• Russel grew 12 inches when he was 3 years old.

• Russel grew 12 inches over 3 years.

The temperatures in NYC were tracked in this graph.

What does the point (3, 50) represent?

• On the third day, it was 50 degrees F.

• It was only 3 degrees F on day 50.

• The temperature rose 3 degrees on day 50.

• None of these.

Sarah tracked the value of her car in this graph.

What does the point (2005, 14500) represent?

• In 2005, her car was worth $14,500.

• Her car was worth $2,005.

• She bought the car for $14,500.

• Her car lost $2,005 in value from $14,500.