If 15 people chose green as their favorite color and it’s a total of 60 people how many people chose green

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 system of linear inequalities is represented by the graph?

Asequence is defined recursively using the formula f(n + 1) =f(n) - 5. which sequence could be