Determine Where a Quadratic (Parabola) is Increasing or Decreasing

Learn how to determine where a quadratic function (parabola) is increasing or decreasing in this focused math tutorial! Mario's Math Tutoring explains the key concept of analyzing the graph from left to right and how the vertex and axis of symmetry play a crucial role. We'll go through four examples, including parabolas opening up and down, to help you confidently identify increasing and decreasing intervals. In this video, you'll discover: 0:00 Introduction to Increasing and Decreasing Quadratics 0:20 What Does "Increasing" or "Decreasing" Mean? (Left to Right Analysis) 0:50 Common Mistake: Confusing Y-values with X-intervals 1:10 Key Focus: The Vertex and Axis of Symmetry 1:40 Example 1: Parabola Opening Up (Vertex at x=0) 2:40 Example 2: Parabola Opening Down (Vertex at x=2) 3:00 Common Mistake: Looking at Y-values for Intervals 4:00 Relating Increasing/Decreasing to Slope (Conceptual) 5:00 Example 3: Parabola Opening Up (Vertex at x=-1) 6:20 Quick Check/Hack: Upward Opening Parabolas Decrease then Increase 6:50 Example 4: Parabola Opening Down (Vertex at x=4) 8:00 Quick Check/Hack: Downward Opening Parabolas Increase then Decrease 8:30 Recap: Focus on X-values for Intervals, not Y-values Master identifying the increasing and decreasing intervals of quadratic functions for your algebra course! #QuadraticFunctions #IncreasingDecreasing #Parabolas #Vertex #AxisOfSymmetry #Algebra #MathTutorial #MathHelp ➡️JOIN the channel as a CHANNEL MEMBER at the "ADDITIONAL VIDEOS" level to get access to my math video courses(Algebra 1, Algebra 2/College Algebra, Geometry, PreCalculus), midterm & final exam reviews, ACT and SAT prep videos and more! (Over 390+ videos) https://www.youtube.com/channel/UClOR1BiPyOkkIAnv9Cmj4iw/join