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Q: What do each of the variables in speed equation stand for?

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The answer depends on the equation!

The equation which remains true for each set of variables in the table.

It is each TERM of the equation or expression

There can be linear equations with 1, 2, ... variables. Each of these is different since an equation with n variables belongs to n-dimensional space.

There is no equation in the question, only an expression. An expression cannot be solved.

To graph the set of all the solutions to an equation in two variables, means to draw a curve on a plane, such that each solution to the equation is a point on the curve, and each point on the curve is a solution to the equation. The simplest curve is a straight line.

You can write an equation that works in forward and reverse by setting the same variables on either side. Alternatively you can set offsetting variables on each side which will also create the same results.

The statement "A system of linear equations is a set of two or more equations with the same variables and the graph of each equation is a line" is true.

In the context of geometry, related to a line. In an algebraic context, an equation or expression where each of the unknown variables appears with a power of 1. If there are n variables, then such an equation, plotted in n-dimensional coordinate space would be a straight line.

In the context of geometry, related to a line. In an algebraic context, an equation or expression where each of the unknown variables appears with a power of 1. If there are n variables, then such an equation, plotted in n-dimensional coordinate space would be a straight line.

This is a linear equation in two variables and the coordinates of each and every point on the line that it describes is a solution. A single linear equation does not have an "answer".

3x + y = 5 is a linear equation in 2 unknown variables. Each of the two variables can be expressed in terms of the other, but it cannot be solved. In short, there is no answer.

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