Pining a is located at -4/6 and point b is located at -1/6.what is the distance between points A and b

Awall map has a scale of 128 miles = 6 inches. the distance between springfield and lakeview is 2 feet on the map. what is the actual distance between springfield and lakeview? 384 miles 512 miles 1.13 miles 42.7 miles

Let f(x) = 3 − x . find the average rate of change of f(x) from x = a to x = a + h and simplify your answer so that no single factor of h is left in the denominator.

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?