Evaluating Linear Functions and Y Values

The video tutorial explains how to calculate the average rate of change for a linear function over a given interval. It involves substituting the interval's bounds into the function to find corresponding Y values and then determining the difference between these Y values. The tutorial emphasizes understanding the concept of difference as a subtraction problem.

What is Daria trying to calculate in the given problem?

• The sum of Y values

• The average rate of change of a linear function

• The product of X values

• The difference between X values

What should you do with the X values from the interval?

• Ignore them

• Plug them into the linear function

• Subtract them

• Add them together

What is the Y value when X is 1 in the function y = 2x + 1?

• 4

• 1

• 2

• 3

What is the Y value when X is 4 in the function y = 2x + 1?

• 10

• 9

• 8

• 7

What is the change in Y values from X = 1 to X = 4?

• 7

• 5

• 6

• 3

How can the difference in Y values be described?

• As a multiplication problem

• As a division problem

• As a subtraction problem

• As an addition problem

What is the Y value at the upper bound of the interval?

• 12

• 3

• 9

• 6

What is the final calculation to find the difference in Y values?

• 9 + 3

• 9 - 3

• 9 * 3

• 9 / 3