I need to figure out what the slope is.

i think it would be 42cm

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

m=-16

step-by-step explanation:

im not sure what your asking ?

step-by-step explanation: