9. The chief executive of Rex Cars wants to investigate the relationshipbetween the number of new car sales and the amount of money spenton advertising. She collects data from company records on the numberof new car sales, y, and the cost of advertising each year, x (£000). Thedata are shown in the table below.Cost of advertising (£000),(x)Number of new car sale,Year(y)20051204240200612643802007132442020081344440200913744302010144452020111484590201215046602013153470020141584790a. Use your calculator to find the equation, y = a + bx, of the line of best fit(the least squares regression line of y on x).b. Interpret the value of a.c. Calculate the predicted number of car sales made in 2015 if the companyspends £163 000 on advertising.

The independent variable is Cost of advertising. The dependent variable is Number of new car sales.…

Answered: 9. The chief executive of Rex Cars…

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter2: Linear Equations

Section: Chapter Questions

Problem 2PFA

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