4.2 Parallel vs Perpendicular Lines

If a line is perpendicular to the one shown, then its slope would be...

If a line is parallel to the one shown, then its slope would be...

Record your answer as a fraction.

Determine the relationship between \overline{AB} and \overline{CD}.

A(0,2), B(5,4), C(1,8), D(3,3)

Slope of \overline{AB}:

Slope of \overline{CD}:

parallel, perpendicular, or neither:

Spelling counts.

Determine the relationship between \overline{AB} and \overline{CD}.

A(-2,3), B(2,6), C(-1,0), D(3,3)

Slope of \overline{AB}:

Slope of \overline{CD}:

parallel, perpendicular, or neither:

Spelling counts.

Determine the relationship between \overline{AB} and \overline{CD}.

A(-1,8), B(2,6), C(-1,2), D(3,3)

Slope of \overline{AB}:

Slope of \overline{CD}:

parallel, perpendicular, or neither:

Spelling counts.

Write the equation for the line parallel to y = -\frac{2}{7}x+6 through (21,9).

point-slope form:

Write the equation for the line perpendicular to -4x+5y=35 through (-20,14).

point-slope form:

Write the equation for the line parallel to y=x+7 through (-6,14).

point-slope form:

slope-intercept form:

Write the equation for the line perpendicular to 9x-4y=-8 through (9,-17).

point-slope form:

slope-intercept form: