He made a profit of thirty dollars
30,27,24,21,19,16,13,10,7,4,1,-2,-5,-8,-11,-14,-17,-20,-23,-26
just take away 3 from each number
1/4, because in 1/3, you would only need 3 parts to get one whole, but in 1/4, you would need 4 parts to get a whole.
Domain is the set of input values whilst range is the set of output values. i think 3x is your domain and -3 +1 is your domain
