Plzz help I need the answers for part A .

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 .

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.

Type the correct answer in each box. use numerals instead of words. if necessary, use / for the fraction bar. consider the given table.