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Masja [62]
3 years ago
5

Help plz 20 pts TOTAL 10 pts each

Mathematics
1 answer:
motikmotik3 years ago
5 0

Answer:

This question needs a step to step long explanation.

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The table shows the shipping costs for items of different values. A 2-column table with 4 rows. The first column is labeled tota
Lisa [10]

A strong positive correlation.

Step-by-step explanation:

The question requires you to calculate the correlation coefficient and then make a conclusion about its value.

Form a table as shown where x is cost of items and y is shipping cost

x               y           xy                   x²         y²

25           5.99       149.8          625         35.9

45            8.99       404.6       2025        80.8

50            8.99      449.5         2500       80.8

70            10.99      769.3         4900       120.8

190           34.96     1773.2        10050      318.3 ------sum

The formula for correlation coefficient follows;

r=n(∑xy)-(∑x)(∑y) ÷ √{[n∑x²-(x)²] [n∑y²-(y)²]}

where n=4

r=4(1773.2)-(190)(34.96) ÷ √{[4(10050)-190²] [4(318.3)-34.96²]}

r=450÷ √{4100*51)

r=450÷√209100

r=450÷457.3

r=0.98409

The value of r indicates a stronger positive correlation

Learn More

Correlation coefficient :brainly.com/question/12528676

Keywords :shipping costs,cost of items, strength of the model

#LearnwithBrainly

4 0
4 years ago
Read 2 more answers
The y-value of tan(x) when x = -90° and x = 90° is undefined.<br><br> True<br><br> False
svlad2 [7]
The answer is (False) that is not true
4 0
4 years ago
HELPP PLEASE ASAP I REALLY NEED HELP <br> attachment below
iren2701 [21]
When you rotate 90 degrees clockwise, (x,y) becomes (y,-x).

Therefore:
G = (3,1)
H = (0, 4)
I = (-2, -3)
6 0
4 years ago
Read 2 more answers
If shape B is made from shape A with a scale factor of 3, are the lengths of the sides of shape B going to be longer, or shorter
tresset_1 [31]

Answer: Shorter.

Step-by-step explanation:

Lets say B's side length is 2, if B's side length is 2 than A's side length is 6

2*3=6

8 0
3 years ago
Jenny invests $2,000 at an interest rate of 5%. The amount of money, ma, in Jenny's account after t years can be
Margaret [11]

After t years, the expression that can be used to represent the money in Jenny account is  Mp=2000(1.05)^t+(1.05)^4

<h3 /><h3>Compound interest Computation</h3>

Given Data

  • Principal  P = $2000
  • Rate r = 5%
  • Time t = 4 years

A = P + I where

P (principal) = $2,000.00

I (interest) = $431.01

Calculation Steps:

First, convert R as a percent to r as a decimal

r = R/100

r = 5/100

r = 0.05 rate per year,

Then solve the equation for A

A = P(1 + r/n)^nt

A = 2,000.00(1 + 0.05/1)(1)(4)

A = 2,000.00(1 + 0.05)(4)

A = $2,431.01

Summary:

The total amount accrued, principal plus interest, with compound interest on a principal of $2,000.00 at a rate of 5% per year compounded 1 times per year over 4 years is $2,431.01.

Learn more about compound interest here:

brainly.com/question/24924853

7 0
3 years ago
Read 2 more answers
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