Which ratio in the form a: b is equivalent to the ratios in the table?

If a is a nonzero real number then the reciprocal of a is

The domain of a function can be represented by which one of the following options? o a. a set of output values o b. a set of f(x) values o c. a set of input values o d. a set of both input and output values

There were 25 students who answered to a survey about sports. four-fifths of them like football. how many students like football?