Please help me I can’t figure out how to solve

Tracy solved the following problem. which of the statements is true? 9 ÷ 3 + 6 × 2 3 + 6 × 2 9 × 2 18 her answer is correct. her answer is incorrect. she should have multiplied before dividing. her answer is incorrect. she should have multiplied before adding. her answer is incorrect. she should have added before dividing.

Look at attachment. has all info needed. need

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