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Flashcards in rational Deck (25)
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1

If we are adding fractions what must we have?

common denominator

2

If we see (x-1) and (1-x) how can we make them equivalent?

pull out a -1 from one

3

When you multiply fractions- how do you multiply?

straight across the top and straigh across the bottom

4

When you divide fractions you....

multiply by the reciprocal

5

reciprocal

when you flip a fraction

6

terms are seperated by

addition or subtraction signs

7

When we see f-1 what does it mean?

we are finding the inverse we switch x and y

8

When we are finding the inverse of something what do we do?

switch x and y solve for y

9

If we are finding an inverse graph, what do we do?

switch x and y for all points

10

When simplifying rational expressions, what is the first step

factor

11

How do we know something is a rational expresion?

fractions with x as a denominator

12

How do we find holes in rational expressions?

set the denominator=0 and whichever crosses out is the hole

13

How do we find vertical asymptotes in rational expressions?

set the denominator=0 and whichever does not cross out is the asymptote

14

How do we write vertical asymptotes

x=

15

Is vertical up and down or side to side?

up and down

16

Is horizontal up and down or side to side?

side to side

17

How do we find horizontal asymptotes

look at the degree of the numerator and denominator

18

If the numerator has a larger degree what is the horizontal asymptote?

there is none

19

If the denominator has a larger degree what is the horizontal asymptote?

y=0

20

What is an asymptote?

An invisible line your graph can never cross

21

If the numerator and denominator ahve the same degree, what do we do to find the horizontal asymptote?

divide the leading coefficients

22

How do we know which quadrants we graph a rational equation in?

We plot the y intercept

23

How do we find a y intercept in a rational expression?

x=0

24

How do we find the x int in a rational expression?

set y=0 in tghe simplified form

25

If there is an asymptote at y=0, what do you know aboutg the x intercepts?

there are none