+0

0
427
3
+69

Question 1 (1 point)

https://postimg.org/image/q1ywkkmt7/

Which equation BEST represents the line of best fit for the scatter plot?

Question 1 options:

y = 2x

y = 2x + 2

y = -2x + 2

y = x + 2

Save

Question 2 (1 point)

https://postimg.org/image/on78wz0hz/

Which equation best represents the line of best fit for the scatter plot?

Question 2 options:

y = x + 6

y = 2x + 6

y = -x + 6

y = -2x + 6

Save

Question 3 (1 point)

https://postimg.org/image/mp7tgsdt7/

Which of the linear equations BEST represents the line of best fit for the scatter plot?

Question 3 options:

y = x + 1

y = 2x - 1

y=1/2x−1

y=−1/2x−1

Question 4 (1 point)

https://postimg.org/image/hay1c5lpv/

Which linear equation is the BEST representation of the line of best fit for the scatter plot?

Question 4 options:

y = 3

x = 3

y = -3

x = -3

JOKERdps  Jun 7, 2017
edited by JOKERdps  Jun 7, 2017
#1
+27057
+1

We have no view of the scatter plots!!

Alan  Jun 7, 2017
#2
+27057
+2

For question 1 it looks like a straight line through the points would go through y = 2 when x = 0, so the constant term is 2.

The line would increase by 2 units in y for every 1 unit increase in x, so the gradient is 2.

Hence the best fit line would be y = 2x + 2

Try the others using the same reasoning (if the line decreases as x increases the gradient will be negative).

Alan  Jun 7, 2017
#3
+90023
+2

Question 2

It appears that  when y changes by -3, x changes  by 3

So the slope is  :  change in y  / change in x   =   -3/3  = -1

And the y intercept  is at 6

So.....using the slope intercept form :

y = -1x + 6    =  -x + 6

Question 3

When  y changes by - 1, x changes by 2  →  slope  =   -1/2

And the y intercept appears to be at  -1

So   the equation is

y  = (-1/2)x - 1

Question 4

Easy!!!....this is a vertical line  at x  = -3

And that's the equation !!!!

CPhill  Jun 7, 2017