Evaluating Linear Functions and Expressions

The video tutorial explains how to evaluate linear functions at specific points, including numerical values, negative values, and variables. It demonstrates the process of substituting values into the function and solving for x when given a specific function output. The tutorial also covers graphical representation of function points and emphasizes understanding the difference between plugging in values and setting the function equal to a value.

What is the primary goal when evaluating a linear function?

• To replace x with a specific value

• To find the slope of the function

• To graph the function

• To determine the y-intercept

If f(x) = 2x + 5, what is f(2)?

• 13

• 11

• 9

• 7

Which point does the function f(x) = 2x + 5 pass through when x = 2?

• (2, 13)

• (2, 11)

• (2, 9)

• (2, 7)

What is the result of evaluating f(x) = 2x + 5 at x = 0?

• 10

• 5

• 2

• 0

What is the y-value when x = 0 for the function f(x) = 2x + 5?

• 0

• 2

• 5

• 10

What is the result of evaluating f(x) = 2x + 5 at x = 1?

• 5

• 8

• 7

• 6

What is the y-value when x = 1 for the function f(x) = 2x + 5?

• 5

• 7

• 6

• 8

What is the result of evaluating f(x) = 2x + 5 at x = 3?

• 9

• 10

• 11

• 12

What is the y-value when x = 3 for the function f(x) = 2x + 5?

• 12

• 10

• 9

• 11

What is the result of evaluating f(x) = 2x + 5 at x = -1?

• 1

• 2

• 4

• 3