The sample is all voters in the district that think he’s doing a good job
Substitute the given information into the formula and do the arithmetic.
5(86 -32)/9 = 5(54/9) = 5(6) = 30
The temperature was 30 °C.
Yes, it's y= 1/2x because it's 1/2 miles (y) per x weeks
bearing in mind that lines with an undefined slopes are vertical lines, Check the picture below.