Test question-

if a half a pound of grapes is $1.75, and a single pound of grapes is $5.50, then how many pounds are in $10.50 & $19.25 ?

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 .

What are the measures of angles a, b, and c? show your work and explain your answers. 25 points

Me d is also an option but i couldn't get it in the picture