What is the slope of a line perpendicular to line A?

what is the slope of Line A?

Step-by-step explanation:

once you have the slope of line a, you need to make the slope negative, and turn the number into its reciprocal, so if the slope of line a was 2/3, the perpendicular slope would be - 3/2, you flip the fraction and make it a negative. if its a whole number you just put a one on top, so if the slope is 3, the perpendicular is - 1/3