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S_A_V [24]
4 years ago
13

Brainliest for the correct awnser!! A calculator was used to perform a linear regression on the values in the table. The results

are shown to the right of the table.What is the line of best fit?A.y = –0.984x + 13.5B.y = –2.9x + 13.5C.–0.984 = –2.9x + 13.5D.y = 13.5x – 2.9

Mathematics
1 answer:
marin [14]4 years ago
6 0

Answer:

Option B

Step-by-step explanation:

Taking the derivative of the residual function, then applying the normal equation:

[a; b] = (X'*X)^(X'*y)

with

X = [1 1; 2 1; 3 1; 4 1; 5 1]

X' is transpose of X

y = [11; 8; 4; 1; 0]

[a; b] =  [-2.9 13.5]

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The triangles are similar.<br><br> What is the value of x?
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Answer:

x=4

Step-by-step explanation:

First of all, the sides of the smaller triangle are multiplied by 5 to make it bigger. So, multiply 4 by 5 which gives you 20. So, 20= 3x+8.

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8 0
3 years ago
The number of students in a class is 60. The number of boys is seven-fifths the number of girls. Find the number of boys in the
Fynjy0 [20]

Step-by-step explanation:

Let the number of girls = x

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\because \: no \: of \:  boys + no \: of \: girls \:  = 60 \\  \\  \therefore \:  \frac{7}{5} x + x = 60 \\  \\ \therefore \:  \frac{7x + 5x}{5} = 60 \\  \\  \therefore \:  \frac{12x}{5} = 60 \\  \\  \therefore \: x = 60 \times  \frac{5}{12}  \\  \\ \therefore \: x = 5 \times 5 \\  \\ \therefore \: x = 25  \\  \\  \therefore \:  \frac{7}{5} x =  \frac{7}{5}  \times 25 = 7 \times 5 = 35 \\

Thus, no of boys in the class is 35.

3 0
3 years ago
State if the triangles are similar. If so, how do you know they are
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Step-by-step explanation:

they're similar since 36 % 9 = 0 and 24 % 6 = 0 (they leave no remainder)

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