To find the unit rate for brake pads produced per hour, we can look at the total production and the hours worked. We know from the provided data that:
- In 3 hours, 48 brake pads are produced.
- In 6 hours, 96 brake pads are produced.
- In 9 hours, 144 brake pads are produced.
- In 12 hours, 192 brake pads are produced.
We can calculate the unit rate using the 12-hour production as it gives us the total number of pads produced and the total hours worked.
Total brake pads produced in 12 hours = 192 brake pads Total time = 12 hours
Now, we calculate the unit rate:
\[ \text{Unit rate} = \frac{\text{Total brake pads}}{\text{Total hours}} = \frac{192 \text{ brake pads}}{12 \text{ hours}} = 16 \text{ brake pads per hour} \]
Thus, the unit rate for brake pads produced per hour is:
D. 16 brake pads per hour
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