Concept explainers
Insulation in a House The R value of insulation in a house is a measure of its ability to resist the loss of heat from the house. The R value of fiberglass insulation is a linear function of its thickness in inches. One type of fiberglass insulation that is 6 inches thick has an R value of 19. The R value in general of this type of insulation is obtained by multiplying 3.2 by the thickness x measured in inches and then adding the result to -0.2. Express the R value of this insulation as a function of x, the thickness in inches. Obtain values of the function when
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