1. Introduction to Quadratic Functions
September 23rd, 2016

2. What shape does it make? Why?
Ex. 1: Graph the quadratic function by plotting points from the following table of values. x
f(x) -2 -1 1 2
What shape does it make? Why?
Does this graph have a minimum or a maximum value? What is it?
What is the y-intercept? What is the x-intercept?

3. Vocabulary
Quadratic Function: A function that can be written in the form
Parabola: The shape of the graph of a quadratic function.
Extrema: Minimum or maximum values of a function.
Minimum: The smallest y-value of a function.
Maximum: The largest y-value of a function.
x-intercept: A point where a function crosses the x-axis, found by substituting in y=0.
y-intercept: A point where a function crosses the y-axis, found by substituting in x=0.

4. Ex. 2: Graph the quadratic function by plotting points from a table of values. If possible to deduce from your work, determine the minimum/maximum value (and specify which), and the x-and y-intercepts.

5. Ex. 3: Graph the quadratic function by plotting points from a table of values. If possible to deduce from your work, determine the minimum/maximum value (and specify which), and the x-and y-intercepts.