Which represents a function?

Mathematics

2 answers:

ollegr [7]4 years ago

5 0

Answer:

Only the given table represents a function. Option 1 is correct.

Step-by-step explanation:

A relation is called a function, if there exist a unique value of y for each value of x. It means for each input there exist a unique output.

A function is always a relation but all relations are not function.

In the given table for each value of x, we have unique value of y, therefore the given table represents a function.

In second relation, at x=-2, the values of y are y=10 and y=-7. For single x, there are more than one value of y, therefore the second relation is not a function.

In third relation, at x=6, the values of y are y=-2 and y=1. For single x, there are more than one value of y, therefore the third relation is not a function.

shtirl [24]4 years ago

3 0

Answer:

the answer is A ;)

Step-by-step explanation:

You might be interested in

if 1 gallon of paint covers 400 square feet, about how many gallons of paint are needed to paint the outside of a spherical tank

ollegr [7]

Given:
Diameter if the spherical tank = 20 ft.
Now,
We know,
radius = diameter / 2
= 20 / 2
= 10 ft.
Now,
The area of the spherical tank = $4 \pi r^{2}$

= $4 \pi (10)^{2}$

= $4 * \pi *100$

= $1256.637061$

= $1256.64~ft^2-->rounded$

Now,
According to the question,
400 ft² needs 1 gallon of paint
1 ft² needs (1 / 400) gallon of paint
1256.64 ft² needs (1 / 400) * 1256.64 gallon of paint
= 3.1416 gallon of paint
= 3.14 gallon of paint --------------> rounded

So, we need 3.14 gallon of paint

6 0

4 years ago

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julia-pushkina [17]

Step-by-step explanation:

if that's what you mean