The following are advertised sale prices of color televisions at an electronics store. Size (inches) Sale Price ($) 9 137 20 177 27 287 31 447 35 1177 40 2177 60 2497 Part (a) Decide which variable should be the independent variable and which should be the dependent variable. O Independent variable: sale price; Dependent variable: size Independent variable: size; Dependent variable: sale price Part (b) Part (c) Does it appear from inspection that there is a relationship between the variables? Why or why not? O Yes, it appears that the television cost increases with television size. Yes, it appears that the television cost decreases with television size. No, there is no visible relationship between the variables. Part (d) Calculate the least squares line. Put the equation in the form of: ŷ = a + bx. (Round your answers to three decimal places.) タ=

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Matrices

‘Matrices’ is the plural form of the word matrix, and it is basically a spreadsheet in the form of a box. In mathematics, various functions can be carried out with matrices. Generally, a matrix comes in the shape of a square or rectangle. The elements are distributed horizontally in the form of rows, and vertically in the form of columns.