What is the slope of this non-vertical line?

Do u just plot the numbers on the graph like (1,

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.

9/10 divide by -3/15 as a mixed number