# Graphing quadratic functions in standard form

Converting a standard form quadratic function to a graph can be accomplished by finding the y-intercept, vertex, and x-intercepts (if they exist) and fitting a parabola to those points. It is easy to find these points when a quadratic function is in Standard Form because they can all be found by plugging a, b, and c into particular formulas.

y-intercept: (0,f(0))

vertex: (-b/2a,f(-b/2a))

x-intercepts: use quadratic formula

Some images made using Geogebra.

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0:00 Introduction

0:35 What the value of "a" tells you

0:40 General points we can get from stand form quadratic

1:30 Example 1

5:08 Example 2

7:16 Pr(Joe Happy Today) LEQ Pr(You Subscribed) LEQ 1

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