What is the slope of (-3,3.6) and (5,2)

Iam trying to solve a linear equation for the shoe size of someone 84" tall taking into consideration example 1 is 69" tall with a shoe size of 9 and example 2 is 72 inches tall with a shoe size of 11. i understand that the equation should be y=mx+b and that on the graph the answer is (3,2) but i just don't understand how to create the equation to solve for 84-inches and 60-inches tall questions. after two days, i need .

Which number line represents the solution set for the inequality -1/2x> 24?

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?