Question

Which is the Equation of a line perpendicular to the line

A 4x+3y=3
B 4x-3y=5
C 3x-4y=3
D 3x+4y=5

Answer 1

which line?
Hint: A&C and B&D are perpendicular

Answer 2

For Ax + By = C
the slope is -A/B

e.g. the slope of 3x - 4y = 3 is -3/-4 or 3/4

remember that if a given line has slope of k/l, then the perpendicular line will
have slope of - l/k ,
e.g. 6/7 vs -7/6

Use this information to answer your question