Video4: parallel SLOPE

For this example, when you're given two points, you're going to have to subtract in order to find the slope first. So we're given 9 9. It says line J passes through these two points. 9 9 and 6 7. So we first have to find the slope of these two points by subtracting. 9 9 and 6 7. So we're going to write 9, 9, and 6, 7, right underneath each other. These are my X numbers. These are my Y numbers. Please circle your Y numbers. Because these are the numbers that you have to subtract first. So your slope is equal to 9 -7 at the top. And then 9 -6 at the bottom. Now I -7, 7, 8, 9 is two. 9 -6, 6, 7, 8, 9 is three. So our slope of the first line is two third. They ask us line K is perpendicular. So that means that what number would be what slope would be perpendicular to two thirds. So your ten ridiculous slope would be the three goals at the top. The two goes at the bottom. I see an imaginary positive sign here, so a negative sign would go here. So a perpendicular slope would be negative three over two. So let's go ahead. And type that in and see if we get the right answer. So we have. Negative. Three over two. And let me hit submit.