Parallel Lines Algebra STAAR

Parallel Lines never intersect because...

• they have the same slopes. 

• they have the same y-intercept.

• they have different slopes.

• they have different y-intercepts. 

2 Lines with same slope and they never touch.

• Perpendicular Lines

• Parallel Lines

• Intersecting Lines

• Oblique Lines

Tags

CCSS.HSG.CO.A.1

• F   y = 3x +1
• G     5 - 3x
• H    y = (1/3)x + 1
• J    17 - 3x

Slopes of parallel lines are...

• opposite reciprocals.

• opposites.

• equivalent.

• always 7.

Tags

CCSS.8.EE.B.5

Give an equation of a line that is parallel to the line y = -3x

• y = 2/3x - 2

• y = 3x + 2

• y = -3x - 1

• y = -2/3x + 3

Mathematical Equivalence

ON

Write an equation for a line parallel to the line
y = 1/3x - 4 through (-3, 2)

• y = 2/3x +3

• y = -1/3x + 3

• y = 1/3x + 3

• y = -5/3x + 3

What is the equation in slope intercept form of the line that passes through (5, -1) and is parallel to y = -3/5x - 4.

• y = 3/5x - 4

• y = -3/5x + 1

• y = 5/3x - 28/3

• y = -3/5x + 2

Mathematical Equivalence

ON

y = 3x +2
y = 3x - 3
These lines are...

• Parallel

• Perpendicular

• Neither

• The same line