Please help, I don't know how to explain them.
For problems 1 and 2, graph the data points. Draw the line of best fit and, using complete sentences, explain how you found it in 3-4 sentences. Write the equation for the line of best fit in standard form.

(10, 150) (20, 275) (30, 340) (40, 400) (50, 475)

Title: Intersection Cars
Horizontal axis: Minutes elapsed
Vertical axis: Total cars passing through

(2, 12) (4, 21) (6, 19) (8, 30) (10, 29) (12, 26) (14, 35) (16, 40) (18, 46) (20, 42)

Title: Savings Account
Horizontal axis: Years
Vertical axis: Balance in $ × 1000

Question

Please help, I don't know how to explain them.
For problems 1 and 2, graph the data points. Draw the line of best fit and, using complete sentences, explain how you found it in 3-4 sentences. Write the equation for the line of best fit in standard form.

(10, 150)  (20, 275)  (30, 340)  (40, 400)  (50, 475)

Title: Intersection Cars
Horizontal axis: Minutes elapsed
Vertical axis: Total cars passing through

(2, 12)  (4, 21)  (6, 19)  (8, 30)  (10, 29) (12, 26)  (14, 35)  (16, 40)  (18, 46)  (20, 42)

Title: Savings Account 
Horizontal axis: Years
Vertical axis: Balance in $ × 1000

mrnood · Answer

http://hotmath.com/hotmath_help/topics/line-of-best-fit.html

anonymous · Answer

@MrNood  I still don't get how to explain it. It is not explained enough in my lesson either