Question 257343
I can't seem to understand how to write equations of lines. I know its a pretty vague questions but I honestly need your help with it or I might fail the class and my HSA

I'll try to help:

For a point (x,y) to be on a line, x and y must be related in this way:

ax + by + c = 0 where a, b and c are constants. This representation for the equation of the line is called the standard form of a line. Another way to represent the relationship is through what is called the slope-intercept form of a line which is:

y = mx + b. In this alternative repesentation m is the slope of the line and b is the value of y when x = 0 or the value of y when the line the crosses the y axis.

If substituting the values for x and y of a point (x,y) does not make the line equation true then the point is not on the line.