 # Is A Straight Up And Down Line A Function?

## What is the equation of a straight vertical line?

The equation of a vertical line always takes the form x = k, where k is any number and k is also the x-intercept .

(link) For instance in the graph below, the vertical line has the equation x = 2 As you can see in the picture below, the line goes straight up and down at x = 2..

## What does diagonal look like?

A diagonal is made out of a straight line that’s set at an angle instead of straight up or across. If you picture a square and draw a line connecting the opposite corners, that’s a diagonal line. You’ll find diagonal lines in geometry, and also in the world around you.

## How do you type a straight line?

Press and hold the “Shift” key, then press the “” key, located above “Enter” or “Return,” to create a straight vertical line.

## What do you call a sideways line?

Oblique lines, segments, or rays: Lines, segments, or rays that intersect at any angle other than 90° are called oblique.

## How do you use the vertical line test to identify a function?

To use the vertical line test, take a ruler or other straight edge and draw a line parallel to the y-axis for any chosen value of x. If the vertical line you drew intersects the graph more than once for any value of x then the graph is not the graph of a function.

## What is a straight up and down line called?

The terms vertical and horizontal often describe directions: a vertical line goes up and down, and a horizontal line goes across. … You can remember which direction is vertical by the letter, “v,” which points down.

## How do you tell if a line is a function or not?

The vertical line test can be used to determine whether a graph represents a function. If we can draw any vertical line that intersects a graph more than once, then the graph does not define a function because a function has only one output value for each input value.

## What type of line goes up and down?

Vertical lines go up/down, but they never go left or right.

## Can a circle be a function?

So the question is whether there’s a function whose graph is the circle. A circle is a set of points in the plane. A function is a mapping from one set to another, so they’re completely different kinds of things, and a circle cannot be a function.

## Is a straight vertical line a function?

For a relation to be a function, use the Vertical Line Test: Draw a vertical line anywhere on the graph, and if it never hits the graph more than once, it is a function. If your vertical line hits twice or more, it’s not a function.

## Can a straight line be a function?

A linear function is a function whose graph is a straight line. The line can’t be vertical, since then we wouldn’t have a function, but any other sort of straight line is fine.

## How do you tell if a graph represents a function?

Use the vertical line test to determine whether or not a graph represents a function. If a vertical line is moved across the graph and, at any time, touches the graph at only one point, then the graph is a function. If the vertical line touches the graph at more than one point, then the graph is not a function.