I am really struggling on this question please help

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

Solve the following inequalities and show the solution on a number line. 3/4 (2x-7) ≤ 5

The party planning committee has to determine the number of tables needed for an upcoming event. if a square table can fit 8 people and a round table can fit 6 people, the equation 150 = 8x + 6y represents the number of each type of table needed for 150 people.