Marquis wrote the linear regression equation y=1.245x - 3.684 to predict the cost, y, of x songs purchased. Marquis spent $40 on songs. Which is the best estimate of the number of songs that Marquis purchased?
Accepted Solution
A:
What you should do for this casp is to use the given expression and clear the value of x. We have then: y = 1.245x - 3.684 Clearing x: 1.245x = (y + 3.684) x = (y + 3,684) / (1,245) Substituting the value of y: x = ((40) +3,684) / (1,245) = 35.09 x = 35 answer: the best estimate of the number of songs that Marquis purchased is 35