the table below shows the age of some participants in a quiz competition and the number of questions they could answer correctly:

age (years) (x)

1521 1722 16 1918

number of questions they could answer (y) 17171717 1717 17

what is the correlation coefficient for the data, and what does it represent? (5 points)

o

0; it represents no correlation between x and y

o

o

b

1; it represents a linear positive correlation between x and y

o

o

c

-1; it represents a linear negative correlation between x and y

o

d

1; it represents a linear negative correlation between x and y

intl

slope = (y2 -y1) ÷ (x2 -x1)

slope = (0 -0) / (-5, -7)

slope = 0 / -12 = 0

the slope of the line is zero. it is perfectly horizontal.

step-by-step explanation:

step by step resolutions

1) n+n+1+n+2=51

3n+3=51

3n=48

n=16

the three numbers are 16, 17 and 18.

2) x+15=4x

3x=15

x=5

radha is now 5 years old

3) the two digits are x and y.

y=3x

(10x+y)+(10y+x)=88

y=3x

11x+11y=88

y=3x

x+y=8

x+3x=8

x=2

the original number can be either 28 or 82.

4) n+(n+2)+(n+4)=48

3n+6=48

3n=42

n=14

the numbers are 14, 16 and 18.

5) y=x+3

10y+x+10x+y=143

y=x+3

11x+11y=143

y=x+3

x+y=13

x+x+3=13

2x=10

x=5

the original number can be 57 or 75.

hope this !

0.038

step-by-step explanation:

Answer: d. 48 step-by-step explanation: i used a calculator so i am 100% sure these are right mark as brainliest?

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