Which pair of ratios is proportional?
a. 6/21 and 2/42
b. 25/100 and 50/150
c. 18/24 and 6/12
d. 7/14 and 20/40

i think its d. but i'm not sure.

Find an equation of the line perpendicular to the graph.

Ateacher asked his students to vote for an animal to be their class pet. five-eighteenths of the students voted for a rabbit, voted for a snake, and voted for a hamster. which statement is true? more students voted for a hamster than a snake. more students voted for a snake than a rabbit. more students voted for a rabbit than a hamster. more students voted for a snake than a hamster.

Enter the number of complex zeros for the polynomial function in the box. f(x) = x+ + 5x² +6