This relation is already written in ordered pairs. The only thing you have to do is place the ordered pairs inside braces { } and name the relation!
R = {(2, 3), (1, 2), (4, 2), (2, −1), (−2, 1)}
EXPLAIN" dont give me the answer EXPLAIN. please help

- anonymous

- schrodinger

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- anonymous

- anonymous

- anonymous

i going to take a exam AND i need to understand

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## More answers

- jim_thompson5910

I don't understand the question fully. What do they want exactly? Is that all it says?

- anonymous

look

- anonymous

A relation simply describes a relationship and pairs input values with output values. You can represent a relation in several ways. The snacks were represented as ordered pairs, like (3, pretzels).
Let's look at a relation with pairs of numbers, instead of a number and a snack.
Select each tab to see four ways this relation can be written.
(2, 3), (1, 2), (4, 2), (2, −1), (−2, 1)

- jim_thompson5910

so it looks like you already wrote the answer

- anonymous

its just practice, but i need to understand the problem, because i going to take the exam

- jim_thompson5910

Is this practice applet providing the steps and answer?

- anonymous

never mind, explain me this

- jim_thompson5910

can you post a full screenshot of the entire problem?

- anonymous

Find the domain and range of the relation shown here in graph form.

##### 1 Attachment

- anonymous

can you explain me this?

- jim_thompson5910

domain = set of x values
range = set of y values

- jim_thompson5910

so you just list the x coordinates of each point to get the domain

- anonymous

(3,4) (5, 8)?

- jim_thompson5910

what are the x coordinates

- jim_thompson5910

hint: each point is of the form (x,y)

- anonymous

{−3, −1, 1, 5}?

- jim_thompson5910

very good, that is your domain

- jim_thompson5910

the range is similar, just with the y values

- anonymous

thank you, can you explain me with more questions? plz

- jim_thompson5910

sure I'll help with one more

- anonymous

Identify the slope and y-intercept of the equation. y − 4 = −3x.

- jim_thompson5910

add 4 to both sides to get y = ???

- anonymous

y − 4 = − 3x
+4 +4
y = − 3x + 4

- jim_thompson5910

very nice

- anonymous

im right?

- jim_thompson5910

compare y = -3x + 4 to y = mx+b
you'll find that m = -3 and b = 4
m is the slope
b is the y-intercept

- jim_thompson5910

since m = -3, the slope is -3
since b = 4, the y-intercept is 4. This is the point (0,4)

- anonymous

yea, thank you for explain me

- jim_thompson5910

you're welcome

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