What is the constant of proportionality between y and x the graph?

Which graph shows a function with a range of all real numbers greater than or equal to -1

What is the sum of these mixed numbers 2 1/8 + 4 3/8

According to the number line, what is the distance between points a and b? v ++ + + + + -16 -14 -12 -10 -8 + 6 + 4 + -2 + 0 + 2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 o6 units o 7 units 12 units o 14 units