1. **State the problem:** We are given the equation of the line of best fit for speed limit $y$ based on houses per mile $x$ as $$y = -\frac{1}{2}x + 45.$$ We need to check which statement is true:
- A road with 32 houses per mile would likely have a speed limit of about 30 miles per hour.
- A road with 12 houses per mile would likely have a speed limit of about 50 miles per hour.
2. **Use the formula:** The speed limit $y$ is calculated by substituting the number of houses per mile $x$ into the equation:
$$y = -\frac{1}{2}x + 45$$
3. **Calculate speed for 32 houses per mile:**
$$y = -\frac{1}{2} \times 32 + 45 = -16 + 45 = 29$$
So, the speed limit is about 29 miles per hour, which is close to 30.
4. **Calculate speed for 12 houses per mile:**
$$y = -\frac{1}{2} \times 12 + 45 = -6 + 45 = 39$$
So, the speed limit is about 39 miles per hour, not 50.
5. **Conclusion:** The first statement is true: a road with 32 houses per mile would likely have a speed limit of about 30 miles per hour.
The second statement is false because the speed limit for 12 houses per mile is about 39, not 50.
**Final answer:** The statement "A road with 32 houses per mile would likely have a speed limit of about 30 miles per hour" is true.
Line Best Fit A19E00
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