The number of hours charged by electrician is 6.
A linear equation in two variable has the general form as y = ax + by + c, where a, b and c are integers and a, b ≠ 0.
It can be represented as a straight line on a graph.
Given that,
The one time charge of electrician is $29.95.
And, the charge per hour is $62.50.
The total money charged by electrician is $404.95.
Suppose the number of hour be x.
Then, for the given case following equation can be made,
62.50x + 29.95 = 404.95
=> 62.50x = 404.95 - 29.95
=> 62.5x = 375
=> x = 6
Hence, the electrician charged the customer for 6 hours.
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