Answer:
The red line, which is perpendicular, has a slope of 7/3
Explanation:
Perpendicular lines have slopes that multiply to -1
-3/7 * m = -1
Multiply by -7/3
-7/3 *-3/7 * m = -1*-7/3
m = 7/3
The red line, which is perpendicular, has a slope of 7/3