Question

hello i need a lot of helpQuestion:A repair service charges by the hour. The amount of money they charge is below. What equation does the repair service use to charge customers?Chart:1 hour cost 702 hour cost 1003 hour cost 1304 hour cost 1605 hour cost 1906 hour cost 220Options:c=30h+70c=30h+40c=40h+30c=40h

Answer 1

Step 1. The following table represents the cost per hour of the repair service:

Required: Find the equation that relates the number of hours and the cost.

Step 2. Let h be the number of hours and c be the cost of the service.

As we can see in the table each hour that goes by, the cost increases by 30:

That means that the cost per hour is 30.

Step 3. Now that we know that the cost per hour is $30, we can find the additional fee using the first row of the table.

If the cost for 1 hour is $70, and only $30 of those $70 is the cost per hour, the additional $40 is the fee.

Step 4. All of this is represented by the equation:

$c=30h+40$

Because it is charged 30 per hour h plus an additional fee of 40.

Answer:

$c=30h+40$