Which relation represents a function?

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it

m∠a is 90°

m∠b is 40°

look at photo

abby has a greater debt becasue she owea 5 more then alan does