What is the domain of -3x^(1/3)+4x^(1/2)

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 .

Acar travels at an average speed of 52 miles per hour. how long does it take to travel 299 miles

Identify this conic section. x2 - y2 = 16 o line circle ellipse parabola hyperbola