What is the mean absolute deviation 20, 10, 30, 20, 50, 30, 40, 20
a. 8
b. 10
c. 12
d. 20
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The table represents a linear function. what is the slope of the function? –6 –4 4 6

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.