Abel is making brownies for a bake sale

The recipe shows the amount of each ingredient needed to make 9 brownies

to make 45 brownies, abel needs 15 eggs,

abel needs 5 cups of flour to make 45 brownies

if abel uses 4 cups of sugar, he need to use 2 cups of cocoa powder

the recipe will make 3 brownies if abel only uses 1 egg