Q:
# What is a vertical line?

A:

**A vertical line is one that is parallel to the y-axis of a graph.** A vertical line is also perpendicular to the x-axis of the same graph, which means that the value of the x-coordinate for a vertical line does not change.

A vertical line can be verified by checking the x-coordinate of that particular line. Any vertical line has the same value of x-coordinate throughout, which means that any two points on that line will have the same value of x-coordinate. When drawing a vertical line, you should get the value of x-coordinate for the line by putting the value of y as 0 in the equation of the line to get the x-intercept of the line. After getting the value of the x-coordinate, simply mark that point on the x-axis and then draw a straight line perpendicular to the y-axis to this point. Such a line will be parallel to the y-axis of the graph and, therefore, according to the definition of vertical lines, will be a vertical with respect to this graph. A vertical line has no slope, which can easily be proved as the value of x-coordinate of the line is same all along its path.

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Q:
## What is a "coordinate plane"?

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Full Answer >**According to the Math Planet, a coordinate plane is a two-dimensional number line that is composed of a horizontal line called the x-axis and a vertical line called the y-axis.**These two lines are perpendicular with each other and intersect at a point called the origin.Filed Under: -
Q:
## Which way is horizontal?

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Full Answer >**A horizontal line runs parallel to the horizon, at a 90 degree angle to a vertical line.**A person lying down in a flat position would create a horizontal line; a standing person would create a vertical line.Filed Under: -
Q:
## What is the definition of a "y-intercept?"

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Full Answer >**The y-intercept is the point where a curve or a function intersects the y-axis.**For a Cartesian plane, this refers to the point where x = 0.Filed Under: -
Q:
## How can you represent diminishing returns by using a graph?

A:Diminishing returns is graphed by assigning the input factor to the x-axis and assigning the output, or product, to the y-axis. The total product curve is the total number of units produced per units of input. The marginal product curve is the marginal product generated per units of input. Diminishing returns is reflected at the point where the marginal product curve has a negative slope.

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