Question

Help will give Medal

Which of the following equations would graph a line perpendicular to y = 3/4x + 5?

A. y =3/4 x – 5

B. y = -3/4x + 5

C. y = 4/3x + 5

D. y = -4/3x + 5

Answer 1

a perpendicular line will have a negative reciprocal slope. All that means is " flip " the slope and change the sign. Example : 5/6...negative reciprocal is -6/5 (see how I flipped the slope and changed the sign).
slope 5/6 and slope -6/5 will be perpendicular.
So what will be the negative reciprocal of the slope given in y = 3/4x + 5 ?

Answer 2

Just realized my previous answers were of no help...! Kelliegirl33 is absolutely right here.

Answer 3

Would it be C?

Answer 4

not C. What is the slope in y = 3/4x + 5 ?

Answer 5

in y = mx + b form, the slope is in the m position. So what is the slope in y = 3/4x + 5 ?

Answer 6

wait i think i understand would it be D? because you flip 3/4 which would be 4/3 then it would be -4/3? (im not very good at math)

Answer 7

that is correct....the negative reciprocal can be found by " flipping " and changing the sign.
So negative reciprocal of 3/4 is -4/3....so your perpendicular equation is : y = -4/3x + 5

Answer 8

Thank you! that makes so much more sense now!

Answer 9

glad to help :)

Answer 10

remember this...a parallel line will have the same slope, but perpendicular lines will have negative reciprocal slopes

Answer 11

ok i will Thanks again!

Answer 12

sure thing :)