Question

Choose the equation of the line passing through the point (1, -5) and perpendicular to y = 1 fifthx - 10.

y = 5x + 10

y = 5x

y = -5x - 10

y = -5x

Answer 1

In the form
y = mx + b
m is the slope of the line, right?

Answer 2

yes?

Answer 3

Well, what's the slope of
\[\large y = \frac15x-10\]

Answer 4

1/5

Answer 5

Yeap :)
Now what's the relation between the slopes of perpendicular lines?

Answer 6

5?

Answer 7

If two lines are perpendicular, then their slopes are negative reciprocals of each other :)

Answer 8

I think it is D