Oct. 11 Class

Learning Goals: Be able to write a quadratic equation that represent data.

Today we discussed how we can take data from a real life situation and turn it into a quadratic equation.  First we plotted points from a table of values and then filled in a line of best fit.  Once we get the zeros from the line of best fit, we can write down and equation in factored form.  Using another point from the graph, we can then calculate the a value.

Handout: Creating quadratic models from data

Here are the notes:

When we substitute a point into the equation to solve for a, we can choose any point.  In this case we chose (0, 20).

In this graph, only points near the axis were given, so we had to extend it to estimate what the zeros might be.

Homework: p. 176 #1-4, 11, 12