Question

read the following description of a data set.
an automobile dealership ran a radio ad campaign to help sell its least popular model. the dealership always used the same ad but broadcast it a different number of times each week.
the sales manager tallied the number of ads broadcast each week, x, and the weekly sales of the model, y.
the least squares regression line of this data set is:
y = 0.833x + 5.432
how many sales of the model does this line predict for a week where the ad is broadcast 19 times?
round your answer to the nearest integer.
cars

Explanation:

Step1: Sustituir el valor de \(x\) en la ecuación

Dado \(x = 19\) y la ecuación \(y=0.833x + 5.432\), sustituimos \(x\):
\(y=0.833\times19 + 5.432\)

Step2: Calcular el primer término

\(0.833\times19=15.827\)

Step3: Sumar el segundo término

\(y = 15.827+5.432=21.259\)

Step4: Redondear al entero más cercano

Redondeando \(21.259\) al entero más cercano, obtenemos \(21\)

Answer:

\(21\)