Y=9x+3 and x+9y=4 perpdencular or barrel

If we write a line in the form

Then the coefficient m is the slope of the line.

Two lines and are:

The first line is already in the required form: . We deduce that its slope is 9.

Let's rewrite the second line in the required form:

So, its slope is -1/9.

9 and -1/9 are obviously not equal, so the lines are not parallel.

But their product is -1, which means that the lines are perpendicular.

step-by-step explanation:

try remembering the steps

what is

step-by-step explanation: