Understanding Function Values from a Graph

The video tutorial explains how to determine function values from a graph using function notation. It covers the process of identifying the input (x-value) and finding the corresponding output (y-value) on the graph. The tutorial provides examples for F(-3), F(5), and F(0), demonstrating how to locate these points on the x-axis and determine their y-coordinates, which represent the function values.

What is the main concept to remember when using function notation?

• The function value is unrelated to the graph.

• The output is always a negative number.

• The input is the x-value and the output is the corresponding y-value.

• The input is always a y-value.

How do you find the function value for F(-3) on a graph?

• Locate -3 on the y-axis and find the corresponding x-value.

• Look for the point where y is -3 and x is 0.

• Find the point where x is 3 and y is -3.

• Locate -3 on the x-axis and find the corresponding y-value.

What are the coordinates of the point used to find F(-3)?

• (2, -3)

• (-3, 2)

• (3, -2)

• (-3, -2)

When finding F(5), what is the y-value you identify on the graph?

• 2

• 0

• 5

• -2

What are the coordinates of the point used to find F(5)?

• (5, 0)

• (2, 5)

• (0, 5)

• (5, 2)

What is the function value of F(0) based on the graph?

• 0

• 5

• 2

• -2