WILL MEDAL + FAN:
Illustrate how you can determine whether two lines are parallel or perpendicular. Write an equation for a graph parallel to the line graphed below, and an equation with a graph perpendicular to the line graphed. Explain.

Question

WILL MEDAL + FAN:  
Illustrate how you can determine whether two lines are parallel or perpendicular. Write an equation for a graph parallel to the line graphed below, and an equation with a graph perpendicular to the line graphed. Explain.

liziekay · Answer

|dw:1471986576713:dw|
y=2x
y=-1/2
perpendicular

liziekay · Answer

-1/2x ***

liziekay · Answer

|dw:1471986620773:dw|
y=2x +1
y+ 2x +3 parallel

mathstudent55 · Answer

If two lines have the same slope, they are parallel.
If the slopes of two lines are negative reciprocals, then the lines are perpendicular.