This dot plot is symmetric, and the data set has no extreme values.
4 5 6 7 8 9 10
What is the best measure of center for this dot plot?
O A. The smallest value
OB. The mean absolute deviation (MAD)
O C. Either the mean or the median
O D. The interquartile range (IQR)

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour

the answer is:

mean: 6

mad: 2.14