
Concept explainers
Tofind:The cost to place an ad in newspaper if the number of lines of text is 0, and also explain the reason for the non proportionality of cost of an ad to the number of lines of text.

Answer to Problem 10IP
The cost to place an ad in newspaper is
Explanation of Solution
Given information:The formula to find the cost Cto place an ad in a newspaper is:
Here,Lis the number of lines of text.
Calculation:
As given the formula for cost of an ad is given by
Substitute
So, the value of Cwhen
A relationship is proportional if the line joining the points of relationship is a straight line that passes through the origin.
Draw the graph of the line for cost
Figure(1)
As observed from graph, the line for cost
So, the given relationship for cost to the number of lines of text is not proportional.
Therefore, the cost to place an ad in newspaper is
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