if two points are plotted and then the third point falls in line with the other two. i.e. (1,1), (2,2), (3,3). these would create a linear plot.
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A system of linear equations is two or more simultaneous linear equations. In mathematics, a system of linear equations (or linear system) is a collection of linear equations involving the same set of variables.
'goes up by the same amount each time'
The satellite dish is a parabolic reflector. A parabola cannot be modeled by a linear equation because a linear equation is one that graphs as a straight line. It takes a second degree expression to plot it, and that means a quadratic equation.
Yes. Any linear equation of the form x = c (meaning that the coefficient of y is zero and that the graphed line is vertical) is not a function, as all points are verticaly above or below every other point. This is by definition a nonfunction.
The term "linear line" is redundant; lines are necessarily linear, since linear means in the form of a line.