May you please help me with this, it is over till midnight 2 ASAP please i beg

This is about scatter plot...my worst enemy please help, please

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

#2**+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**+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