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2 years ago

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Which relation is a function?

1 answer:

Debora [2.8K]2 years ago

6 0

The relation which is a function is; Choice A;<em> {(6, −4), (5, 8), (−3, 6), (−4, −4)}</em>

<h3>What is a function?</h3>

In mathematics, a function from a set of values for variable x to a set of values for variable y assigns to each element of x only one element of y. The set X is called the domain of the function and the set Y is called the codomain of the function.

On this note, since in Choice A, each x-value is mapped distinctively to one value of y, Choice A is a function.

Read more on functions;

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Ming works as a quality assurance analyst at a bottling factory. She wants to use a one-sample z interval to estimate what propo

Nastasia [14]

Answer:

Sample size is $n=423$

Step-by-step explanation:

Given that,

Margin of error $=4$ %

Confidence level $=90$ %

Suppose, sample proportion $=0.5$

i.e. $\hat{P}=0.5$

We know that,

Margin of error $=2^*\sqrt{\frac{\hat{p}(1-\hat{p})}{n} }$

∴ $1.64\sqrt{\frac{0.5(0.5)}{n} } \leq 4\%$

$\Rightarrow 1.64\sqrt{\frac{0.25}{n} } \leq 0.04$

$\Rightarrow \frac{0.5}{\sqrt{n} } \leq \frac{0.04}{1.64}$

$\Rightarrow \frac{0.5}{\sqrt{n} } \leq 0.0243$

$\Rightarrow \sqrt{n}\geq \frac{0.5}{0.0243}$

$\Rightarrow \sqrt{n}\geq 20.57$

squaring on both side,

∴ $n=423.1249$

Hence, the sample size is,

$n=423$

Hence, the correct option is $(b).$

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3 years ago

A line is perpendicular to y = 3x - 8

Leya [2.2K]

Answer: the equation is y=-1/3x

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2 years ago

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Which number best represents a helicopter ascending 112 ft? A. −112 B. +112 C. 112+ D. 112−

vampirchik [111]

Answer:

B +112

Step-by-step explanation:

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2 years ago

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Whts X+y x 9 +3 +4 ?

babunello [35]

Expression simplified: $x+9y+7$

Step-by-step explanation:

The expression that we have in this problem is:

$x+y\cdot 9 +3 +4$

The first type of operation that we have to solve in such expression are multiplication/division.

In this expression, there is only one multiplication, that is:

$y\cdot 9 = 9y$

So we can rewrite the expression as

$x+9y+3+4$

Now we can evaluate the sum of the similar terms: in this case, similar terms are only 3 and 4, and their sum is

$3+4=7$

Therefore, the expression can be rewritten as

$x+9y+7$

Learn more about simplifying expressions:

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3 years ago

What is the product of 3/4 and -6/7 ?

Allisa [31]

Answer:

-9 / 14

Step-by-step explanation:

Product means multiply
3/4 x -6/7 = -9 / 14

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2 years ago

Read 2 more answers