Learn about perpendicular lines in geometry with Khan Academy's video lesson.

Proof that perpendicular lines have negative reciprocal slopes.

2018年11月13日 · How do you find a line that goes through a given point and is parallel or perpendicular to a given slope? Example: Through (-4,5) parallel to y = -2x - 3.

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A line that's flat has a slope of 0. If a line goes up as you move to the right, it has a positive slope. The steeper it is, the bigger the slope. If a line goes down as you move to the right, it has a negative slope. The steeper it is, the more negative the slope.

Introduction to parallel and perpendicular lines in geometry.

For example, we can see that opposite sides of a parallelogram are parallel by writing a linear equation for each side and seeing that the slopes are the same. In analytic geometry, also known as coordinate geometry, we think about geometric objects on the coordinate plane.

Learn about derivatives and the slope of tangent lines in this Khan Academy video.

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You got the general formula right, but you got confused on step 1 or 2. Slope is definitely delta y/delta x, but, to make it easier, it is also y₂ - y₁/x₂ - x₁. You can plug in the coordinate values as: (1 - 3) / (0 - (-1)) which is -2/1, or -2