Write an equation of the line that passes through (2,3) and is perpendicular to the line shown. Please help!!

Ihave trouble finding the nth term of a linear sequence

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.

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)