# At what point on the curve is the tangent line vertical?

## At what point on the curve is the tangent line vertical?

The vertical tangent to a curve occurs at a point where the slope is undefined (infinite). This can also be explained in terms of calculus when the derivative at a point is undefined.

**Is tangent line horizontal or vertical?**

Horizontal tangent lines exist where the derivative of the function is equal to 0, and vertical tangent lines exist where the derivative of the function is undefined.

### What does it mean when the tangent line is vertical?

In mathematics, particularly calculus, a vertical tangent is a tangent line that is vertical. Because a vertical line has infinite slope, a function whose graph has a vertical tangent is not differentiable at the point of tangency.

**How do you know if the tangent line is above or below the curve?**

If f′′(a)>0, f ″ ( a ) > 0 , then we know the graph of f is concave up, and we see the first possibility on the left, where the tangent line lies entirely below the curve. If f′′(a)<0, f ″ ( a ) < 0 , then f is concave down and the tangent line lies above the curve, as shown in the second figure.

#### When tangent line is horizontal?

A horizontal tangent line is a mathematical feature on a graph, located where a function’s derivative is zero. This is because, by definition, the derivative gives the slope of the tangent line. Horizontal lines have a slope of zero. Therefore, when the derivative is zero, the tangent line is horizontal.

**What slope is a vertical line?**

undefined slope

Vertical lines are said to have “undefined slope,” as their slope appears to be some infinitely large, undefined value.

## How do you describe the tangent line to a curve?

tangent, in geometry, the tangent line to a curve at a point is that straight line that best approximates (or “clings to”) the curve near that point. It may be considered the limiting position of straight lines passing through the given point and a nearby point of the curve as the second point approaches the first.

**How do you show a tangent to a curve?**

To determine the equation of a tangent to a curve: Find the derivative using the rules of differentiation. Substitute the x-coordinate of the given point into the derivative to calculate the gradient of the tangent.

### What are the points on the curve where the tangent is horizontal?

To find the points at which the tangent line is horizontal, we have to find where the slope of the function is 0 because a horizontal line’s slope is 0. That’s your derivative. Now set it equal to 0 and solve for x to find the x values at which the tangent line is horizontal to given function.

**Is a slope of horizontal or vertical?**

Remember the Slope Formula When graphing linear equations, remember that m, the slope, is calculated by finding the vertical change between two points divided by the horizontal change between those two points.

#### How do you tell if a slope is horizontal or vertical?

Note that when a line has a positive slope it rises up left to right. Note that when a line has a negative slope it falls left to right. Note that when a line is horizontal the slope is 0. Note that when the line is vertical the slope is undefined.

**What is the slope of the tangent line?**

(See above.) The tangent line represents the instantaneous rate of change of the function at that one point. The slope of the tangent line at a point on the function is equal to the derivative of the function at the same point (See below.)

## Which line is tangent line?

A tangent line is a line that intersects a circle at one point. Such a line is said to be tangent to that circle. The point at which the circle and the line intersect is the point of tangency.