Does Quadratic Function Smile or Frown?

shape of quadratic functions

Visual clues are often the easiest to recall. Relative to auditory presentation, a visual display normally persists over time, reducing demands on working memory. Picture your problems with attitude. To remember the effect of the coefficient of the x2 term on the shape of quadratic functions picture a positive attitude with a smiley face for a positive coefficient, and a negative attitude (frowning face) for a negative coefficient.

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