How to find the intervals that a function is increasing and decreasing

The video tutorial explains how to read a graph, focusing on identifying intervals where the function is increasing or decreasing. The instructor emphasizes the importance of reading the X-axis from left to right and understanding that increasing and decreasing intervals are determined by X values. The video covers specific intervals where the graph increases (2 to 4 and 7 to infinity) and decreases (negative infinity to 2 and 4 to 7). The tutorial concludes with a reminder to focus on X values when describing these intervals.

What is the primary axis used to determine if a function is increasing or decreasing?

• X-axis

• Z-axis

• W-axis

• Y-axis

Between which X values does the graph increase according to the example given?

• 6 to 8

• 5 to 7

• 2 to 4

• 1 to 3

What is the term used to describe the graph's behavior from X value 7 onwards?

• Negative Infinity

• Positive Infinity

• Constant

• Zero

From which X value does the graph start decreasing?

• 2

• 4

• 8

• 6

What is the range of X values where the graph is decreasing before it starts increasing again?

• 0 to 2

• 4 to 7

• 7 to 10

• 10 to 12