Question

I'll mark brainliest and thank profile, just need help.

Answer 1

Answer:

The equation of the regression line for the following data is:

y=2.4x+120.1

Step-by-step explanation:

We are given a set of data values in table form as:

           Day(x)                  Number of visitors(y)

               1                              120

               2                             124

               3                             130

               4                              131

               5                              135

               6                              132

               7                              135

Hence, when we draw a scatter plot with the help of these data points using the linear regression calculator we see that the regression line is a line with y-intercept as (0,120.1) and x-intercept as  (-50.04,0)

Hence, the regression line for the following data is:

                   y=2.4x+120.1

Answer 2

Answer:

$y = 2.4x + 120.1$

Step-by-step explanation:

Given table,

x              1             2              3              4             5               6          7

f(x)         120        124           130         131          135          132       135

Let the linear equation that shows the given table is,

$y=mx + b$

Where,

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

$b=\frac{\sum y - m\sum x}{n}$

Here, n = 7

Using graphing calculator,

m = 2.35714 ≈ 2.4,

b = 120.143 ≈ 120.1

Hence, the required equation would be,

$y = 2.4x + 120.1$

i.e. LAST option is correct.