CK-12-Pre-Calculus Concepts

1.8. Zeroes and Intercepts of Functions http://www.ck12.org

1.8 Zeroes and Intercepts of Functions

Here you will learn aboutxandyintercepts. You will learn to approximate them graphically and solve for them
exactly using algebra.
An intercept in mathematics is where a function crosses thexoryaxis. What are the intercepts of this function?

Watch This

MEDIA

Click image to the left for use the URL below.

URL: http://www.ck12.org/flx/render/embeddedobject/57945

http://www.youtube.com/watch?v=LeZdCSCIb3Q

MEDIA

Click image to the left for use the URL below.

URL: http://www.ck12.org/flx/render/embeddedobject/57947

http://www.youtube.com/watch?v=pYuiVXdhVSo

Guidance

The first type of intercept you may have learned is they-intercept when you learned the slope intercept form of a
line:y=mx+b. Ay-intercept is the unique point where a function crosses theyaxis. It can be found algebraically
by settingx=0 and solving fory.