Find the HCF of the algebraic terms 3xy and 4x​

If n stands for number sold and c stands for cost per item, in which column would you use the formula: ? a. column d c. column f b. column e d. column g

Anyone know? is appreciated! will mark brainliest if correct!

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)