Answer to Question #255909 in Mechanics | Relativity for Albert

Question

Make the “line of the best fit” for the number of hours you used your cell phone in a week. Let your day represent the y - axis and the number of hours you us your cellphone represent the x – axis.

Answer 1

Day 1 - Number of Hours: 3

Day 2 - Number of Hours: 4

Day 3 - Number of Hours: 2.5

Day 4 - Number of Hours: 4.2

Day 5 - Number of Hours: 3.5

Day 6 - Number of Hours: 2.8

Day 7 - Number of Hours: 4

line of the best fit:

y=ax+b

$a=\frac{\sum y\sum x^2-\sum x\sum xy}{n\sum x^2-(\sum x)^2}$

$b=\frac{n\sum xy-\sum x\sum y}{n\sum x^2-(\sum x)^2}$

where x is number of day,

y is the number of hours

$y=0.057x+3.2$