EF has endpoints (3,7) and (13,17). RT has end points (4,9) and (8,5). If EF is perpendicular to RT (hint: use the slope formula to calculate the slope of each segment and comare them)
1. No, the lines are not perpendicular because the product of their slopes does not equal −1.
2. Yes, the lines are perpendicular because the product of their slopes does not equal −1.
3. Yes, the lines are perpendicular because the product of their slopes equals −1.
4. No, the lines are not perpendicular because the product of their slopes equals −1.