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inn [45]
3 years ago
11

Which of the following sets of ordered pairs represents a function?

Mathematics
2 answers:
Artemon [7]3 years ago
8 0

Answer:

B

{(8,-9), (-8,-5), (8-7), (-8,-6)}

Step-by-step explanation:

A function can have two X values but not two Y values

Lubov Fominskaja [6]3 years ago
4 0

Answer:

<h2>D.</h2><h2>{(-9,8), (-5,-8), (-7,8), (-6,-8)}</h2>

Step-by-step explanation:

A function is defined as the relation between two sets with an specific characteristic:

  • If each x-value has only one y-value assigned, then the expression it's a function.
  • If each x-value has more than one y-value image, then the expression it's not a function, it's just a relation.

So, in this problem, we have to look for this characteristic. Option A has two points with the same x-value and different y-value assigned, so it's not a function. Option B has two y-values assigned for x=8, so it's not a function either. Option C is not a function because x=13 has to different images y=-3 and y=0.

At last, option D represent a function, because each x-value has only one image: {(-9,8), (-5,-8), (-7,8), (-6,-8)}

It's important to notice that, one y-value can have different x-values assigned, that's a function, but it cannot happen in the opposite way, one x-value with more than one y-value assigned.

Therefore, the right answer is D.

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What is the range of the function graphed below?
aleksandrvk [35]

Answer:       B.     [–4, 0)  ∪  [2, ∞)

To find the range, find out what y-values are possible for the function in the graph.

<h2>Symbols</h2>

We need to pay attention to what symbols to use.

<h3>Reading the diagram</h3>

Solid circle

  • The function touches the point.

Empty circle

  • The function gets close, but does not touch the point.

Arrow

  • The function keeps going to infinity.

<h3>Writing range in set notation</h3>

Square brackets: [ and ]

  • These show that the function touches the point.

Curved brackets: ( and )

  • These show that the function gets close but does not touch the point.
  • Infinity always uses a curved bracket.

Union of sets: ∪

  • This symbol shows that sets of values are talking about the same thing. It's almost like the word 'and'.

<h2>Finding the range of the graphed function</h2><h3>Lower blue line</h3>

Let's start by looking for the lowest possible y-value at the bottom of the diagram. On the graph, the point (4, –4) marked with a solid circle.

The function touches the point and stops. Since the y-value is –4, the lowest possible y-value is:     -4

If we follow the blue line upwards, we find an empty circle at (0, 0). The y-value in (0, 0) is 0. This means that the function gets close, but does not include:     0

So, the first part of our range is:

  • [–4, 0)

<h3>Upper blue line</h3>

The blue line on the top starts where y = 2 at a solid circle. So, the function includes the y-value:    2

If we follow this blue line upwards, it ends with an arrow. This means it will keep going to infinity, which is the symbol:    \infty

So, the second part of our range is:

  • [2, ∞)

<h2>Putting it together</h2>

Put the lower and upper blue lines together with the union of sets symbol. The range is expressed as:    [–4, 0)  ∪  [2, ∞)

Learn more about domain and range here:

brainly.com/question/20349151

4 0
2 years ago
PLEASE HELP ILL DO ANYTHING PLEASE. ill give brainliest
Amanda [17]

Answer:

If the ball cost 10 cents and the bat costs $1.00 more than the ball, then the bat would cost $1.10 for a grand total of $1.20. The correct answer to this problem is that the ball costs 5 cents and the bat costs — at a dollar more — $1.05 for a grand total of $1.10.

'Now give me brainiest

8 0
3 years ago
Read 2 more answers
(100 POINTS) Please help I'll give brainliest!<br> Image attached.
Norma-Jean [14]

#1

Area of base=1/2(2.8)(4.2)

  • 2.8(2.1)
  • 5.88in²

Volume:

  • Area of base×Height
  • 5.88(7)
  • 41.16in³

#2

Area of base

  • 6×1/2(7)(6.1)
  • 3(7)(6.1)
  • 128.1cm²

Volume:-

  • 128.1(14)
  • 1793.4cm³
4 0
2 years ago
Read 2 more answers
Plz help which one is not a chord
kaheart [24]

Answer:

Line FN.

Step-by-step explanation:

A chord is a line whose endpoints both lie on the circle.

All the other lines' endpoints are on the circle.

In line FN, point N is on the circle but point F is not.

This makes line FN not a chord.

7 0
3 years ago
The heights of a group of boys and girls at a local middle school are shown on the dot plots below.
stira [4]
D, or The girls are generally taller than the boys.

Hope this helps!
8 0
3 years ago
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