Section 4-3 Reflecting Graphs; Symmetry

Objective: To reflect graphs and to use symmetry to sketch graphs

Refer To

Absolute Value key on the calculatorPage 131 of your text Activities #1-4

Refer To

Pages 132-133

Look at

Explanation on page 134

Example

Test each equation to see if its graph has symmetry in: (i) the x-axis, (ii) the y-axis, (iii) the line y = x, and (iv) the origin

a) x2 + xy = 4b) lxl + lyl = 3

Now check symmetry by graph:

Homework

Due end of class on Friday Sec 4.3 #1-25 odds