What is the equation of f(x)?
f(x)=8(4)
f(x)=-8(4)
f(x)=8[1/4]
f(x)=-8[1/4]

the answers 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

$54.99

step-by-step explanation:

$54.99 includes 500 min. if she does not exceed 500 min then her bill is $54.99