Make a scatter diagram from the following data and interpret the result.

X 4 5 6 7 8 9 10 11 12

Y 78 72 66 60 54 48 42 36 30

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Solution

Thus, there is perfect negative correlation between X and Y.

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Similar questions

X	4	5	6	7	8	9	10	11	12	13	14	15
Y	78	72	66	60	54	48	42	36	30	24	18	12

X	30	36	42	48	54	60	72	82
Y	50	50	54	54	62	66	70	82

x	3	5	8	11	26
y	9	15	24	33	78

x	2.5	4	7.5	10	14
y	10	16	30	40	42

x	5	7	9	15	18	25
y	15	21	27	60	72	75

X	10	6	9	10	12	13	11	9
Y	9	4	6	9	11	13	8	4

&Complete the following tables given that $x$ varies directly as $y$

(i)
$\begin{matrix} x & 2.5 & . . . . & . . . . & 15 y & 5 & 8 & 12 & . . . . \end{matrix}$

(ii)
$\begin{matrix} x & 5 & . . . . & 10 & 35 & 25 & . . . y & 8 & 12 & . . . & . . . . & . . . . & 32 \end{matrix}$

(iii)
$\begin{matrix} x & 6 & 8 & 10 & . . . . & 20 y & 15 & 20 & . . . & 40 & . . . . \end{matrix}$

(iv)
$\begin{matrix} x & 4 & 9 & . . . & . . . . & 3 & . . . . y & 16 & . . . & 48 & 36 & . . . . & 4 \end{matrix}$

(v)
$\begin{matrix} x & 3 & 5 & 7 & 9 y & . . . & 20 & 28 & . . . . \end{matrix}$

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