Question

Help! Medal!

Answer 1

Hint:
product between the slopes of perpendicular lines has to be equal to -1

Answer 2

so it's D? @Michele_Laino

Answer 3

no, if m is the slope of the perpendicular line, then we have:
\[m \times \frac{1}{3} = - 1\]
what is m?

Answer 4

5?

Answer 5

\[m \cdot \frac{1}{3} = - 1\]

Answer 6

m=...?

Answer 7

we have to multiply both sides by 3

Answer 8

I don't understand

Answer 9

hint:
\[\begin{gathered}
m \cdot \frac{1}{3} = - 1 \hfill \\
m \cdot \frac{1}{3} \cdot 3 = - 1 \cdot 3 \hfill \\
m = - 1 \cdot 3 = ...? \hfill \\
\end{gathered} \]

Answer 10

-3

Answer 11

that's right!

Answer 12

so, what is your answer?

Answer 13

B?

Answer 14

the slope of the lines B, is 1/3, whereas
we are searching for a line whose slope is -3

Answer 15

so it is b?

Answer 16

no, B is not the requested line since its slope is 1/3

Answer 17

what is the slope of the line in A?

Answer 18

A?

Answer 19

-3 right?

Answer 20

that's right!

Answer 21

so it's A?

Answer 22

yes!

Answer 23

ok thank you!

Answer 24

thank you!