Find the slope of the line that passes through the pair of points. (If an answer is undefined, enter UNDEFINED.) (−a + 3, b − 1) and (a + 3, −b)

Answer 1

So you just need to plug in the values of (x₁, y₁) and (x₂, y₂) and simplify, It does NOT matter which point you select as point 1 and which you select as point 2. Be careful about the positive and negative signs and make sure you distribute properly. Note that your answer will include the variables a and b.