What is the value of the underlined digit 28

Explain how to use the regression calculator to make a reasonable prediction given a data table

solmaris [256]

Answer:

Given data, first determine which is the independent variable, x, and which is the dependent variable, y. Enter the data pairs into the regression calculator. Substitute the value for one variable into the equation for the regression line produced by the calculator, and then predict the value of the other variable.

Step-by-step explanation:

Enter data into the regression calculator.
Determine the regression equation.
Substitute the correct value for x or y into the equation.
Simplify to find the value of the other variable.

7 0

3 years ago

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Mai is filling her fish tank. Water flows into the tank at a constant rate. Complete the table and answer the question below.

kvasek [131]

Answer:

$r = 1.6$

Step-by-step explanation:

Given

x ----- y

0.5. --- 0.8

1. --- 1.6

3.--- 4.8

25. --- 40

Required

Determine the constant of proportionality

This can be calculated using the following formula:

$y = rx$ ; Where r is the constant of proportionality;

Solve for r

$r = \frac{y}{x}$

When x = 0.5; y = 0.8

$r = \frac{0.8}{0.5}$

$r = 1.6$

When x = 1; y =1.6

$r = \frac{1.6}{1}$

$r = 1.6$

When x = 3; y = 4.8

$r = \frac{4.8}{3}$

$r = 1.6$

When x = 25; y = 40

$r = \frac{40}{25}$

$r = 1.6$

Notice that the value of r is constant throughout;

Hence:

$r = 1.6$

5 0

3 years ago

The variables x and y have a quadratic relationship. Tripling the value of x causes the value of y to increase by a factor of ni

Lady bird [3.3K]

Answer:

The value of y when x has a value of 9 is 18

Step-by-step explanation:

Functions

The variables x and y are said to have a quadratic relationship. That information is not enough to set up a general equation for both variables.

Furthermore, we know that tripling the value of x causes the value of y to be multiplied by 9. That leads us to establish a proportional equation between them, as follows:

$y=kx^2$

Where k is an unknown constant.

Let's use the given point (3,2) to find the value of k:

$2=k(3)^2$

$2=9k$

Solving for k:

$\displaystyle k=\frac{2}{9}$

The equation is now:

$\displaystyle y=\frac{2}{9}x^2$

Now find y when x=9:

$\displaystyle y=\frac{2}{9}(9)^2$

$\displaystyle y=\frac{2}{9}\cdot 81=18$

The value of y when x has a value of 9 is 18

3 0

3 years ago

Why isn’t -3 a whole number? please answer asap

Musya8 [376]

Answer:

-3 is not a whole number because the whole number is like a zero , no fraction or demical part and no negative

Hope this helps :)

Step-by-step explanation:

-3 has negative sign so it's not a whole number

5 0

3 years ago

Read 2 more answers

Which of the following points lies on the circle whose center is at the origin and whose radius is 10?

Naddik [55]

Since the standard form of the circle is:

(x-h)^2+(y-k)^2=r^2, and (h,k)=(0,0) and r=10 so we have:

x^2+y^2=100 Looking at the points you have:

(√10, 0) does not work as (√10)^2+0^2=10+0=10

(0, 2√5) does not work as 0^2+(2√5)^2=0+20=20

(5√2, 5√2) works as (5√2)^2+(5√2)^2=50+50=100

6 0

4 years ago