Number 2 need answers

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 .

In triangle opq right angled at p op=7cm,oq-pq=1 determine the values of sinq and cosq

Which of the following values are in the range of the function graphed below? check all that apply ! - will give the answer "brainliest! "