Check whether the point (a -a) lies on y=x-a or not

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.

Complete the equation of the line through (−10,3) and (−8,−8). use exact numbers.

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie