Which number is equivalent to 4.054

Mathematics

1 answer:

Y_Kistochka [10]3 years ago

3 0

4.05400 is hopefully the answer

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The price of a notebook was $3.65 yesterday. Today the price fell to $3.40. Find the percentage decrease.

Levart [38]

Answer:

6.85% decrease

Step-by-step explanation:

Initial Price = $3.65

Final Price = $3.40

Difference in price = Final - Initial = $3.40 - $3.65 = - $0.25

The negative sign indicates that the price decreased hence we can say that the decrease is positive $0.25.

% decrease

= (Amount decreased / initial price) x 100%

= (0.25 / 3.65) x 100%

= 6.85% decrease

8 0

4 years ago

The following table represents a sample of sale prices, in thousands of dollars, and number of

djverab [1.8K]

Correct question

Sale Price :160 | 180 | 200 | 220 | 240 | 260 | 280

New home : 126 | 103 | 82 | 75 | 82 | 40 | 20

A.) state the linear regression function that estimates the number of new homes available at a specific price.

B.) state the correlation Coefficient of the data, and explain what it means in the context of the problem

Answer:

Y = -0.79X + 249.86

R = -0.9543

Step-by-step explanation:

Sale Price :160 | 180 | 200 | 220 | 240 | 260 | 280

New home : 126 | 103 | 82 | 75 | 82 | 40 | 20

Calculate the Linear regression equation :

Using the linear regression calculator :

The linear regression equation is :

Y = -0.79X + 249.86

The correlation Coefficient 'R' measures the strength of statistical relationship between the relative movement of two variables. The The value of R is -0.9543 in the question above.

This is a strong negative correlation, which means that high sales price of homes scores correlates with low number of new homes scores (and vice versa). Homes with high sales price have fewer number of new homes.