I. Review for Final ExamII. The DiscriminantIII. Quadratic ApplicationsIV. Questions on any Quadratic TopicV. Class Work

Today:

April 24,

2014

Warm-Up/Final Exam Review:

1. Name the x and y intercepts, then graph the line using graph paper.

y intercept is 3; x intercept is 18

3. What are the three methods for solving systems of equations?A. Graphing B. Substitution C.

Elimination4. Solve the following systems of equations

Warm-Up/Final Exam Review:

Quadratic Exam Review

I. The DiscriminantII. Quadratic Applications

III. Questions on any Quadratic Topic

IV. Class Work

The Discriminant

Equation

ax2 + bx + c = 0

Formula

The discriminant is the part of the quadratic formula inside the radicand. The discriminant tells you the number of solutions and should be computed first. If the

discriminant is: = 0; 1 solution > 0; 2 solutions < 0 no solutions

y = 4x2 – 17x – 15

How many times does the graph cross the x axis?

w = 5, l = 15

Quadratic Applications

Quadratic Applications

A batter smashed a fastball high into the gap between left and center fields. The path of the ball is shown by the equation y = -.2x2 + x. This allowed the center fielder enough time to run and make the catch. How high was the ball hit?

-1/.02 = 50; x = 50

Substitute 50 for x; y =

Quadratic Applications

Class Work: