Question

The Aust Corporation has gathered the following data on its copy machine costs for the first eight months of the year. Month Number of Copies Total Copy Cost January 40,000 $ 3,500 February 35,000 $ 3,200 March 60,000 $ 4,100 April 80,000 $ 5,100 May 85,000 $ 5,600 June 75,000 $ 4,800 July 82,000 $ 5,300 August 105,000 $ 6,000

Assuming the line intersects the y-axis at $2,000 and using the January activity levels what is the equation of the line that would be drawn for a scattergraph?

Answer 1

If we use the data of january then the quation of line is

y=mx+c

3500=40000m+2000

3500 is the value on Y axis, 40000 is the value on x axis, m is the slope of the line, 2000 is the Y intersect

the slope of the line will be 3/80 or 0.0375 and this tells the line is positive sloping.