Which of the following statements best describes the relationship of a relation and a function

2 answers:

8 0

A statementent of the relationship and a function is that the numbers from the x-axis cannot be double number with another number heres an example.

For Example:
1 6
7 4
5 2

Ok for example the number seven can only be with only one of the numbers from the right side but the number from the right side can be with more than one number get it now?

I hope this helps you for your math class.

Rama09 [41]4 years ago

7 0

<span>A relation is a function, if and only if, the x- values do not repeat in a given set.</span>

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a cleaning service charges an hourly rate plus a flat fee of $15 for supplies. philip uses the service for 3.5 hours for his spr

Sergeu [11.5K]

Using linear function concepts, it is found that he can correctly determine the hourly rate as follows:

subtract the supply fee, 15 dollars from the total cost, then, divide the difference by the number of hours.

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

A linear function is modeled by:

$y = mx + b$

In which:

m is the slope, which is the rate of change, that is, by how much y changes when x changes by 1.

b is the y-intercept, which is the value of y when x = 0, which can also be interpreted as the initial value of a function that is valid only for $x \geq 0$ , such as is the case in this problem.

The flat fee is of $15, hence b = 15, then:

$y = mx + 15$

Philip uses the service for 3.5 hours for his spring cleaning, and his total is $232, hence when x = 3.5, y = 232, so we use it to find the hourly rate m.

$y = mx + 15$

$232 = 3.5m + 15$

$m = \frac{232 - 15}{3.5}$

Hence, the correct option is:

subtract the supply fee, 15 dollars from the total cost, then, divide the difference by the number of hours.

You can learn more about linear function concepts at brainly.com/question/24808124

7 0

2 years ago

Assume that adults have iq scores that are normally distributed with a mean of 100100 and a standard deviation of 15. find the t

anastassius [24]

The bell curve attached below shows the normal distribution of the data.

We are looking the value of X such as the area to its left gives the probability of 0.75

We first need the z-score which we can obtain by reading from the z-table (as shown in the second picture below)

The z-score is = 0.7734

Then we use the following formula to work out X
z-score = (X - Mean) ÷ Standard Deviation
0.7734 = (X - 100) ÷ 15
0.7734×15 = X - 100
11.601 = X - 100
X = 11.601 + 100
X = 111.601 ≈ 112

Hence the third quartile is 112