Evaluating Functions: Key Concepts and Techniques

The video tutorial explains how to evaluate functions using graphs. It covers finding the Y value when given an X value and vice versa. The teacher uses examples to demonstrate how to navigate the graph to find missing values, emphasizing the use of the x-axis and y-axis for locating these values.

What is the notation used to represent a function in this tutorial?

• f(x) = y

• x = f(y)

• y = f(x)

• f(y) = x

When given an x-value, which axis should you look at to find the corresponding y-value?

• y-axis

• w-axis

• z-axis

• x-axis

If f(-8) = ?, what is the y-value when x is -8?

• 8

• 6

• 4

• 2

For f(8) = ?, what is the y-value when x is 8?

• 1

• 0

• 2

• 3

What is the y-value when x is -4?

• 4

• 0

• 6

• 2

When given a y-value, which direction should you look to find the corresponding x-value?

• Up or down

• Left or right

• Diagonal

• Forward or backward

If f(x) = 6, what is the x-value when y is 6?

• -6

• -7

• -5

• -4

For f(x) = -2, what are the x-values when y is -2?

• 4 and -1

• 5 and -4

• 3 and -2

• 2 and -3

What are the x-values when y is 0?

• -4 and 6

• -3 and 5

• -1 and 3

• -2 and 4

What is the x-value when y is 1?

• 4

• 2

• 6

• 8