Error Analysis DVDs cost $19.99 each for the first 2 purchased. After that, they cost $5.99 each. Describe and correct the error in sketching a graph to represent the relationship between the total cost and the number of DVDs purchased.
To Describe and correct:the error in sketching a graph.
Explanation of Solution
Given information:DVDs costs $19.99 each for the first 2 purchased. After that they cost $5.99 each and graph.
Graph:
If we buy 1 DVD, it costs $19.99
If we buy2 DVDs, it costs
If we buy 3 DVDs, it costs
If we buy 4 DVDS, it costs
It goes like so.
Let’s graph them
Interpretation: The graph is not a continuous graph according to real world situation because we cannot buy decimal or fraction number of DVDs. And another error is when we buy 3 DVD, it costs 3 times $5.99 which is $17.97 but not $5.99.
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