Help me please.i need help

Which of the following lines would not have its equation change after a dilation with a center at the origin? (1) y=x+3 (2) y=10 (3) y=4x (4) x=6

Skie rented a boat for $16.50 per hour. her total rental fee was $49.50. for how many hours did skie rent the boat

Stefan's sculpture is 7/12 foot tall. he attaches it to a base that is 1/3 foot tall. how tall, in feet, is the sculpture with the base?