Question

Which equation best represents the regression line for the data given in the table above?

y = –3x – 20
y = –3x + 20
y = 3x + 20
y = 3x – 20

Answer 1

x y
1 13
2 17
3 14
4 8
5 3
6 –2
7 2

Answer 2

put the x value into the equation, we can get the value of y, and see which one is close to the y from the list

Answer 3

y = –3(1) – 20 y = -23
y = –3(1) + 20 y = 17
y = 3(1) + 20 y = 23
y = 3(1) – 20 y = -17

Answer 4

good, so which one is closest to 13?

Answer 5

B y = –3(1) + 20 y = 17

Answer 6

:) you got it!
but remember, usually you need put at least three x values into the equation to make sure this is the right answer