Evaluating Functions from Graphs

This video tutorial demonstrates how to evaluate functions using graphs within the Delta Math online system. It provides step-by-step examples, showing how to find the output value (y) for given input values (x) by identifying where the graph intersects a vertical line at the specified x-value. The video covers multiple examples, including f(4), f(-9), f(-6), f(6), and f(-4), and concludes with a recap of the process.

What is the main focus of the video tutorial?

• Understanding geometry

• Learning calculus

• Evaluating functions from a graph

• Solving algebraic equations

In the first example, what is the input value for f(4)?

• 3

• 4

• 5

• 6

What is the output value when x is 4 in the first example?

• 5

• 3

• 2

• 4

In the second example, what is the input value for f(-9)?

• 9

• 6

• -6

• -9

What is the output value when x is -9 in the second example?

• 9

• 6

• -9

• -6

In the third example, what is the output value when x is -6?

• 6

• -6

• 5

• -5

In the fourth example, what is the output value when x is 6?

• -6

• 6

• -9

• 9

In the fifth example, what is the output value when x is -4?

• -4

• 4

• -3

• 3

In the sixth example, what is the output value when x is -4 again?

• -3

• -4

• 4

• 3

What do you need to find when given an input value in a function?

• The output value

• The slope

• The x value

• The intercept