Find the equation of each line below.
The line with slope
that goes through the point .
, substitute the values of and and solve for .
and rewrite the equation substituting and back into their original positions.
A horizontal line that goes through the point
A horizontal line has zero slope. Therefore, simply substitute the values for
and into the equation and solve for .
Then, rewrite the equation with
and substituted back into their original equations.
The line perpendicular to the line in part (a) above but going through the origin.
See parts (a) and (b) to solve. Remember that perpendicular lines have opposite reciprocal slopes.