An engineer earns an hourly wage shown in the graph. What is his wage per hour?

50

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40

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60

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20

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Solution

The correct option is B $40$ $
By having a look at the given graph we can observe that the engineer gets his earnings proportional to the hours worked by him.
The slope of the line is constant that means that the hourly wage does not change so it can be evaluated for any time interval on the given graph.
Considering the first-hour work he got $40$ wage, therefore, wage per hour is 40 $/$ 1 \ hr $i . e .40$ per hour.

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