Mathematics, 24.03.2021 19:00 dkckdkcekkxgmaipcom

How can you tell whether a parabola is concave up (happy face) or concave down (sad face) by looking at the vertex form equation

How can you tell whether a parabola is concave up (happy face) or concave down (sad face) by lookin

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How can you tell whether a parabola is concave up (happy face) or concave down (sad face) by looking...