X- and Y- Intercepts
Objective: To identify the x- and
y- intercepts.
Standard 6.0
Return Quizzes



Any questions?
13 total points
2 extra credit points for last question
Intercepts

X-Intercept: where the line crosses the x-axis


ordered pair: (x,0)
Y-Intercept: where the line crosses the y-axis

Ordered pair: (0,y)
Y-intercept
X-intercept
Example 1

State the x- and y- intercepts
x-intercept: (-4,0)
y-intercept: (0,2)
TOO

State the x- and y- intercepts
x-intercept: (3,0)
y-intercept: (0,6)
Example 3

State the x- and y- intercepts
x-intercept: (5,0)
y-intercept: none
Will this vertical
line ever cross
the y-axis? no
Cover up Method!

If an equation is in standard form
ax + by = c
a,b,c are all #’s
Cover up method:


To find x-intercept, cover up the y
To find y-intercept, cover up the x
Example:
5x + 4y = 20
y-intercept: (0,5)
x-intercept: (4,0)
Examples 5 & 6
6x + 3y = -18
y-intercept: (0,-6)
x-intercept: (-3,0)
x – 4y = 14
y-intercept: (0,-7/2)
x-intercept: (14,0)
TOO
Write the x- and y- intercepts as ordered pairs
3y = 2x + 12
5x – 3y = 20
(0,4) (-6,0)
(0, 
20
3
)(4, 0)
Review – Write an equation in
point-slope
(-4,3) m = 1
7
(6,-2)(5,7)
Review – Write an equation in
Standard Form
(5,-15)(11,-3)
y+5 = -4(x+1)
Review – Write an equation in
Standard Form
(8,-7) m = undefined
(9,-2) m = 0
Homework

Pg. 350 #19-21 a & b, 22-27

Write the intercepts as an ordered pair


X-intercept: (#,0)
Y-intercept: (0,#)
Monster Problem Time!!