Determine which ratio forms a proportion with 9/5 by finding a common multiplier. A. 54/30
B. 45/50
C. 45/40
D. 90/20
I need an explanation on how to do it pleasw

i believe the answer is c.

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c

sorry i just need to anwers this to get points

step-by-step explanation: