-3-2 (4-1) simplified is -9
Step-by-step explanation:
Divide 7560 by 9 you get 840. Then you times 840 by 4 you get 3360, Multiply 840 by 5 you get 4200.
The slope of the given line is -4/3. the slope of any perpendicular line is the negative reciprocals, or 3/4