Using Expressions to Describe Patterns

The video tutorial teaches how to use expressions to describe patterns in input-output tables. It introduces the concept of viewing the process as a machine, where input values are transformed into output values. Two patterns are explored: one where the output is double the input, represented by the expression 2x, and another where the output is 5 less than the input, represented by x-5. The lesson concludes with a summary of how to write expressions to represent these patterns.

What is the relationship between the input and output in the first example discussed in the lesson?

• The output is the input divided by 2.

• The output is the input minus 2.

• The output is the input plus 3.

• The output is double the input.

Which expression correctly represents the pattern where the output is double the input?

• x + 2

• 2x

• x / 2

• x - 2

In the second example, what happens to the input number inside the machine?

• 5 is subtracted from it.

• It is divided by 5.

• It is added to 5.

• It is multiplied by 3.

Which expression represents the pattern where the output is 5 less than the input?

• x / 5

• 5x

• x - 5

• x + 5

What skill did you learn in this lesson?

• How to calculate the area of a circle.

• How to write expressions to represent patterns.

• How to find the square root of a number.

• How to solve complex equations.