Lesson36 - Lesson 36 MA 152, Section 3.2 (parabolas) and...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Lesson 36 MA 152, Section 3.2 (parabolas) and append II.2 A quadratic equation of the form c bx ax y + + = 2 , where a, b, and c are real numbers (general form) has the shape of a parabola when graphed. The parabola will open upward if the value of a is positive and downward is it is negative. The vertex is the point or ordered pair where the parabola 'turns'. Ex 1: Graph the parabola 2 3 2 1 2 + - - = x x y . Find its vertex and direction of opening. We will use a table of values and plot the points. x y 0 3/2 1 0 -1 2 2 -5/2 -2 3/2 -3 0 This method is tedious. It will be easier to know how to find the vertex. We could also find intercepts and use symmetry. Notice, the graph is symmetric about a vertical line through the vertex. Identify above. . (1) zeros: (2) axis of symmetry: (3) a pair of symmetric points 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
The axis of symmetry is a vertical line with through the vertex. Points have symmetry (equal distance) left and right about this vertical line. 2
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This document was uploaded on 01/23/2012.

Page1 / 8

Lesson36 - Lesson 36 MA 152, Section 3.2 (parabolas) and...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online