Can someone find the function for this please “If f(x) = 4x - 11, find the values of f(x) for the domain of {-3, 1,5}.”

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 .

Lydia collected two sets of data one set of data shows an outlier. which set has an outlier, and which number is the outlier?

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels