Section 1.2 Intercepts; Symmetry; Graphing Key Equations

1. Section 1.2Intercepts; Symmetry; Graphing Key Equations

2. Objectives: • Find intercepts algebraically from an equation • Test an equation for symmetry • Know how to graph key equations

4. Find the x-intercept(s) and the y-intercept(s) of the graph of then graph by plotting points. To find the x-intercept(s), let y = 0. To find the y-intercept(s), let x = 0.

5. Now find and plot some points.

7. If a graph is symmetric with respect to the x-axis and the point (3,2) is on the graph, what other point is also on the graph? (3,2) (3,–2)

9. If a graph is symmetric with respect to the y-axis and the point (3,2) is on the graph, what other point is also on the graph? (3,2) (–3,2)

11. If a graph is symmetric with respect to the origin and the point (3,2) is on the graph, what other point is also on the graph? (3,2) (–3, –2)

14. x-Axis: Not equivalent so not symmetric with respect to the x-axis. IS equivalent so symmetric with respect to the y-axis. y-Axis: Not equivalent so not symmetric with respect to the origin. Origin:

21. Homework 1.2: #11-25 odd, 33, 39-45 odd, 49, 51, 59, 69-75 odd