May you solving it ? anyone lol its 30 points

Choose the point slope form of the equation below that represents the like that passes through the points (-6,4) and (2, 0)

Kelly is a salesperson at a shoe store, where she must sell a pre-set number of pairs of shoes each month. at the end of each work day the number of pairs of shoes that she has left to sell that month is given by the equation s=300-15x , where s is the number of pair of shoes kelly still needs to sell and x is the number of days she has worked that month. what is the meaning of the number 300 in this equation

Write the rational number in lowest terms 99/-15