Gina is finding the equation of the median-median line for the data set below.
what should she use for the summary points?

minutes studying(x) 0 5 10 10 15 20 25 30 30
test score(y) 68 61 54 64 73 76 80 79 85

group 1: (10, 61); group 2: (15, 64); group 3: (30,80)
group 1: (5, 61); group 2: (15, 73); group 3: (25, 79)
group 1: (10, 54); group 2: (20, 76); group 3: (30, 79)
group 1: (5, 61); group 2: (15, 73); group 3: (30, 8

Minutes studying(x) 0 , 5 , 10 , 10 , 15 , 20 , 25 , 30 , 30
Test score(y)            68, 61, 54, 64, 73, 76, 80, 79, 85
The median of x is 15 (The middle value)
Median of y would be 73 (The middle value)
So group 2 would be (15,73)
Here is the sequence 'x' without median 0 , 5 , 10 , 10, 15
The median would be 10.
Here is the sequence 'y' without median 54, 61, 64, 68, 73
The median is 61.
Hence,
So group 1 will be (5, 61).
73, 76, 79, 80, 85 median of 'y' would be 79
15 , 20 , 25 , 30 , 30 median of 'x' would be 25
so group 3 would be (25 , 79)

Therefore the right answer is :
Group 1: (5, 61); Group 2: (15, 73); Group 3: (25, 79)