Quickly ! which table shows a proportional relationship between x and y?

a. x 7 14 28 35
y 1 2 4 5

b. x 2.5 3 5 6
y 5 6 10 15

c. x 1 2 3 4
y 4 10 12 16

d. x 1 3 4 7
y 2 5 8 14

sorry bout the spaces in them

Which statement is true about the local minimum of the graphed function? over the interval[-4,-2], the local minimum is 0. over the interval [-2,-1] , the local minimum is 25. over the interval [-1,4], the local minimum is 0. over the interval [4,7], the local minimum is -7