### Home > CCA2 > Chapter Ch6 > Lesson 6.1.4 > Problem 6-56

6-56.

Find an equation for each of the lines described below.

The line with slope

that goes through the point . Use slope-intercept form.

The line parallel to

that goes through the point. Parallel lines have the same slope. Use the point-slope form of the equation of a line.

The line perpendicular to

that goes through the point. The slopes of perpendicular lines are opposite reciprocals.

For example,

and The line that goes through the point

so that the tangent of the angle it makes with the *x*-axis is 2.Remember the trigonometric relationships.

How might tangent's relationship to the opposite and adjacent sides relate to the rise and run of the slope?