# Dilations of Quadratic Graphs

##### This Dilations of Quadratic Graphs video also includes:

Challenge: Sketch a graph of a quadratic function without making a table of values. High schoolers learn how different parameters affect the graph of a quadratic function. The problem video focuses on dilations of quadratic graphs.

##### Instructional Ideas

• Use the video to review transformations of quadratic graphs
##### Classroom Considerations

• Note that the concept video covers more than dilations (covers all transformations, including vertical and horizontal shifts)
• Concept video uses a TI-84 Plus graphing calculator; be sure pupils can apply the process to their own calculators
##### Pros

• Video introduces a way for learners to remember the effect of a negative coefficient
##### Cons

• Speaker uses words that don't exist, such as negativise
• Concept video describes horizontal shifts as side-to-side movement, but it does not distinguish how to determine whether the shift is to the right or left
• Resource breezes through examples at a rather quick pace