How do I write linear equations passing through a given point?

A linear euation is an equation whose graph is a line.First while solving or trying to write linear equations, you MUST know your x and y intercept. The x value is always undefined and is the vertical line and the y value is ZERO and is the horzontial line on a graph. You also have to remember the x is the indepenedent variable and the y is the depenedent. The x intercept is a point on a line that touches the x-axis (always at the coordinate point) (X,0). The y intercept is a point where a line touches the y-axis (Y,0).
While solving a linear equation you may need to use slope intercept form which is y=mx+b or either standard form which is Ax+By=C but standard form may also be changed to slope intercept form. When you are graphing points that are perpendicular that pass through a line, you need to find the slope, make it into a fraction, change the reciprical and then change the sign.