The closer the line of best fit is to the points the more accurate it is. The correlation coefficient gives a numerical rank, where 1 is a perfect fit and the closer to 0 it is the less accurate it is.

I need the values of the line at the same x values as the scatterplot points. After you have that take the difference of the value of the line of best fit and the corresponding scatterpoint. if the point is higher than the line then the resiual will be negative and if the point is lower the residual will be positive. Do you have the equation of the line of best fit?

5 0

3 years ago

He can either pay a $150 joining fee and a $10 monthly fee or he can pay a $50 joining fee and a $30 monthly fee. On what month

larisa86 [58]

Answer:it will take 5 months for the cumulative costs of the plans to be equal and the total cos is $200

Step-by-step explanation:

Let x represent the number of months that for which the cumulative costs of the plans will be equal.

Let y represent the total cost of using plan A for x months.

Let z represent the total cost of using plan B for x months.

He can either pay a $150 joining fee and a $10 monthly fee. This means that the total cost of using plan A would be

y = 150 + 10x

For plan B, he can pay a $50 joining fee and a $30 monthly fee. This means that the total cost of using plan B would be

y = 50 + 30x

To determine the number of hours for which the cumulative costs of the plans will be equal, we would equate y to z. It becomes

150 + 10x = 50 + 30x

30x - 10x = 150 - 50

20x = 100

x = 100/20 = 5 months

The total cost would be

150 + 10 × 5 = 150 + 50 = $200

6 0

3 years ago

Each Polio vaccination consists of 4 dieses , and each measles vaccination consists of 2 doses. Last year ,Dr. Potter gave a tot

Darina [25.2K]

Answer:

Last year Dr. Potter give 32 Polio vaccination and 28 measles vaccination.

Step-by-step explanation:

Given:

Each Polio vaccination consists of 4 doses , and each measles vaccination consists of 2 doses.

Last year ,Dr. Potter gave a total of 60 vaccinations that consisted of a total of 184 doses.

Now, to find the number of polio vaccinations and many measles vaccination.

Let the number of Polio vaccination be $x.$

And let the number of measles vaccination be $y.$

So, the total number of vaccinations:

$x+y=60$

$y=60-x$ .......(1)

As, given each Polio vaccination consists of 4 doses , and each measles vaccination consists of 2 doses.

Thus, the total number of doses:

$4x+2y=184$

Substituting the value of $y$ from equation (1):

$4x+2(60-x)=184$

$4x+120-2x=184$

$2x+120=184$

Subtracting both sides by 120 we get:

$2x=64$

Dividing both sides by 2 we get:

$x=32.$

The number of Polio vaccination = 32.

Now, putting the value of $x$ in equation (1):

$y=60-x$

$y=60-32$

$y=28.$

The number of measles vaccination = 28.

Therefore, last year Dr. Potter give 32 Polio vaccination and 28 measles vaccination.

5 0

3 years ago