A line passes through the points ( 4, -1) and (2,3). What is the slope of the line?

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 .

Need ! discuss how to convert the standard form of the equation of a circle to the general form. 50 points

On a piece of paper graph f(x)=5•(0.4)^x