Well, darling, in a linear equation, the "c" stands for the y-intercept. It's the point where the line crosses the y-axis, in case you were wondering. So next time you see that "c," just remember it's where the line starts its journey.
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c is the y-intercept. The line defined by the equation crosses the y-axis (x= 0) at the point (0,c).
A linear equation IS a function. A function can look like X2+X+C, or X3+0, or X+Y+C, or many other ways. The function X+Y+C is a function in two variables, and can be a linear equation.
A linear equation has the form of mx + b, while a quadratic equation's form is ax2+bx+c. Also, a linear equation's graph forms a line, while a quadratic equation's graph forms a parabola.
A linear equation ?
If necessary, rearrange the linear equation so that it is in the slope-intercept form: y = mx + c Then the gradient of the line is m.
A linear equation in standard form will be Ax + By = C or in some books Ax + By + C = 0 where A, B, and C are real numbers such as 3x + 3y = 18