Respuesta :
Linear regression line y=2.1x+130 predicts sales based on the money spent on advertising.
Linear regression represents the relationship between two variables. the value of y depends on the value of x.
x represents the dollars spent in advertising and y represents the company sales in dollars.
We need to find out sales y when $150 spends on advertising.
Plug in 150 for x and find out y
y = 2.1 x + 130
y = 2.1 (150) + 130
y= 445
The company expects $445 in sales
The company expects in sales if it spends $150 in advertising $445.
We have given that linear regression line y=2.1x+130 predicts sales based on the money spent on advertising.
What is the linear regression?
Linear regression is a linear model, that is the model that assumes a linear relationship between the input variables is x and output
variable is y .
That is we can say that the If we have given two variable that is x and y then the linear regression represent the relation between x and y. Where y is dependent variable and x is independent variable.
Here x is independent variable therefore it represents independent veritable and y is the dependent variable therefore y is the dollars spent in advertising and y represents the dependent variable of x and the company sales in dollars.
We have to find the sales y when $150 spends on advertising.then the value of x variable is x=150 we find the value of y by using substitution method of linear equation.
Plug in x=150 and find out y
[tex]y = 2.1 x + 130y = 2.1 (150) + 130y= 445[/tex]
Therefore,the company expects in sales if it spends $150 in advertising $445.
To learn more about the linear regression visit:
https://brainly.com/question/25987747
