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3 years ago

In the expression 2x + 3 , the two is called

Mathematics

1 answer:

melamori03 [73]3 years ago

4 0

The two is called a coefficient because it contains a variable in this case x is the variable :) hope I helped

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In an effort to determine whether any correlation exists between the price of stocks of airlines, an analyst sampled six days of

vovikov84 [41]

Answer:

Check the explanation

Step-by-step explanation:

Following table shows the calculations:

Delta, X Southwest , Y X^2 Y^2 XY

45.96 38.76 2112.3216 1502.3376 1781.4096

46.8 45.41 2190.24 2062.0681 2125.188

47.93 15.7 2297.2849 246.49 752.501

51.78 49.58 2681.1684 2458.1764 2567.2524

52.17 44.34 2721.7089 1966.0356 2313.2178

47.36 18 2242.9696 324 852.48

Total 292 211.79 14245.6934 8559.1077 10392.0488

Sample size: n =6

Now

$S_{yy}=\sum y^{2}-\frac{\left (\sum y \right )^{2}}{n}=1083.27$

$S_{xx}=\sum x^{2}-\frac{\left (\sum x \right )^{2}}{n}=35.03$

$S_{xy}=\sum xy-\frac{\left (\sum x \right )\left (\sum y \right )}{n}=84.94$

The coefficient of correlation is :

$r=\frac{S_{xy}}{\sqrt{S_{xx}S_{yy}}}=0.436$

7 0

3 years ago

Can someone help me with this i am confused

Eva8 [605]

Plot each point on a graph , then count how many you need to go up and then over in this case it is 8 over 1 then calculate the y int so y= 8x -25

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2 years ago

What is the solution to the equation 9k = 40.5? k= 4 k= 4.5 k= 5

Scilla [17]

Answer:

k=4.5

Step-by-step explanation:

40.5/9

3 0

3 years ago

Read 2 more answers

Adjacent Angles: Answer:

lakkis [162]

Hey there!

Adjacent angles are two angles that are connecting, or adjoining. They have a common vertex and a common side, but they DO NOT overlap.

Hope it helps and have a great day!!!!

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3 years ago

There are 81 athletes who joined a parade. Four-ninths of them are basketball players. How many basketball players joined the pa

lozanna [386]

Answer:

Step-by-step explanation:

81 x (4/9) =

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2 years ago