Which of the following is the equation for the graph shown?
PLS HELP... NEED ANSWER ASAP

Four individuals pool money together to start a new business and agree to split the profits equally. n invests $6,000, x invests $2,000, y invests $8,000 and z invests $4,000. if the profits for the first month were $100,000, y receives than if the profits were divided in proportion to how much they invested.

Could somebody me with this radical simplification?

An 18% discount on a watch saved a shopper $72. find the price of the watch before the discount