
Rational Graph Characteristics
Presentation
•
Mathematics
•
10th - 11th Grade
•
Medium
Standards-aligned
Bethany Braun
Used 48+ times
FREE Resource
12 Slides • 19 Questions
1
Rational Graph Characteristics
2
In this Lesson you will learn how to:
Find x & y intercepts
Find vertical & horizontal asymptotes
How to find Domain and Range
3
X-Intercepts
On a graph, this is where the graph touches/crosses the x-axis
For an equation: Factor first, if able, then set each factor of numerator = 0
4
Multiple Choice
What is the x-intercept?
(1,0)
(-1,0)
(0,1)
(0,-1)
5
Multiple Choice
f(x)=x+5x2+2x−3 What is/are the x-intercept(s) ?
(Hint: factor the numerator first, then set = 0)
(0,−3), (0, 1)
(−5, 0)
(0, −5)
(−3, 0), (1, 0)
6
Y-Intercepts
Found the same way as other functions
Plug in 0 for all x's and solve
7
Multiple Choice
f(x)=4x2+2x+12x−3 Find the y-intercept(s).
(0, 21)
(21, 0)
(−3, 0)
(0, −3)
8
Multiple Choice
What are the x and y intercepts?
(4, 0) and (0, -4)
(-4, 0) and (0, -4)
(-4, 0) and (0, 4)
(0, 0) and (0, -4)
9
Vertical Asymptotes: Graphs
A Vertical Asymptote is an imaginary vertical line where the graph approaches but doesn't touch it
In this example, it is x=−2
Be careful! The dotted line is not always shown. You may have to look for the imaginary 'wall'
10
Multiple Choice
What appears to be the vertical asymptote?
x = -3
y = -3
x = -1
y = -1
11
Multiple Select
There are 2 vertical asymptotes here. Which 2 are correct?
x = -3
x = -5
x = -2
x = 3
x = 2
12
Vertical Asymptotes: Equation
The VA come from the undefined values (restricted values) that make the DENOMINATOR = 0
Set DENOMINATOR = 0 (factor first) and solve
Write the asymptote using: x=
13
Multiple Choice
What is the Vertical Asymptote?
x= -5
x= 5
x= 6
x= -6
14
Multiple Choice
What are the Vertical Asymptotes?
(Remember to FACTOR the denominator first!)
x = 0, -5
x=0, 5
x = 2, -7
x = -2, 7
15
Horizontal Asymptotes: Graphs
These are invisible horizontal lines that correspond to the Right/Left ENDS of the graphs. (For really small or really big values of x).
On this graph you can see the left and right sides of the graph seem to approach a y-value of 1.
So the HA is y = 1.
16
Multiple Choice
Let's Review....What appears to be the Vertical asymptote?
y = -3
x = 1
y = -1
y=3
17
Multiple Choice
Now, what appears to be the Horizontal asymptote?
y = -3
x = 1
y = -1
y=3
18
Multiple Choice
Which graph appears to have a Horizontal asymptote of y = -3?
19
Multiple Select
Which 2 graphs appear to have a Horizontal asymptote of y = 0?
20
Horizontal Asymptotes: Equation
A Horizontal Asymptote can be found by comparing the DEGREE of the Numerator to the DEGREE of the Denominator
There are 3 possibilities depending on which degree is higher/lower
21
How to find a Horizontal Asymptote
Horizontal Asymptotes always begin with y=
22
Multiple Choice
What is the Degree of the numerator and denominator?
Num = 4 Denom = 1
Num = 1 Denom = 1
Num = 1 Denom = 2
Num = 0 Denom = 1
23
Multiple Choice
The Degree of the top and bottom are the same. Simplify 4x/x to get the horizontal asymptote. What is it?
y=4
y=0
y=-2
y=1
24
Multiple Choice
What is the horizontal asymptote? (Note: the degree on the top and the bottom are the same)
y = -4
y = 1
x = 1
y = -6
25
Multiple Choice
Find the horizontal asymptote. (Note the Degree is bigger on top.)
None
y=-2
y=2
y=0
26
How to find Domain/Range:
Domain- Read left to right and 'skip' over the Vertical Asymptote
Range - Read bottom to top and 'skip' over the Horizontal Asymptote
27
Domain/Range of this graph?
Domain- We 'skip' over the VA of -2, so the Domain is: (−∞, 2)U(−2, ∞)
Range - We 'skip' over the HA of 2, so the Range is: (−∞, 2)U(2, ∞)
28
Multiple Choice
The vertical asymptote here x= -3, so what is the Domain?
(−∞, ∞) All Reals
(−3,∞) x-values bigger than -3
(−∞,3)U(3,∞) All reals but x = 3
(−∞,−3)U(−3,∞) All reals but x = -3
29
Multiple Choice
The horizontal asymptote here y=0, so what is the Range?
(−∞, ∞) All Reals
(0,∞) y-values bigger than 0
(−∞,0)U(0,∞) All Reals but y = 0
(−∞,−3)U(−3,∞) All reals but y = -3
30
Multiple Choice
What is the domain and range of this graph?
D : All reals but x ≠ -3
R: All reals but y≠ 1
D : All reals but x ≠ 1
R: All reals but y≠ -3
D : All reals but x ≠ 3
R: All reals but y≠ 1
D : All reals but x ≠ -1
R: All reals but y≠ 3
31
Great Job! You learned...
How to find x & y intercepts
How to find Vertical and Horizontal Asymptotes
How to find Domain and Range
Keep Practicing!!
Rational Graph Characteristics
Show answer
Auto Play
Slide 1 / 31
SLIDE
Similar Resources on Wayground
23 questions
Inscribed Angles and Polygons in Circles
Presentation
•
9th - 12th Grade
23 questions
Angles Inside and Outside of a Circle
Presentation
•
9th - 12th Grade
26 questions
Arc Length
Presentation
•
9th - 10th Grade
24 questions
1/19 Key Features of Polynomial Graphs
Presentation
•
11th Grade
25 questions
Properties of Logarithms
Presentation
•
10th - 12th Grade
23 questions
9.6 Vectors in Space
Presentation
•
10th - 12th Grade
24 questions
Quadrilateral Properties
Presentation
•
9th - 12th Grade
21 questions
Absolute Value and Inequalities Review
Presentation
•
9th - 11th Grade
Popular Resources on Wayground
24 questions
PBIS-HGMS Day 10
Quiz
•
6th - 8th Grade
10 questions
HCS SCI 03 Summer School Review 3
Quiz
•
3rd Grade
11 questions
Home Scope
Quiz
•
7th - 8th Grade
15 questions
HCS SCI 05 Summer School Assessment 3 Review
Quiz
•
5th Grade
35 questions
Lufkin Road Middle School Student Handbook & Policies Assessment
Quiz
•
7th Grade
18 questions
Geo 11.3 Area of Circles and Sectors
Quiz
•
9th - 11th Grade