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