Please help me to solve this

Which of the following expressions are equivalent ?

Afurniture store has 1,500 chairs in storage. a manager uses three delivery receipts to simulate samples to check 100 chairs and note the number of brown chairs. suppose the actual number of brown chairs is 1,080. about how many brown chairs are

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