Point-Slope Review with parallel and perpendicular

Point-Slope Review with parallel and perpendicular

Point - Slope Form
 $y-y1=m(x-x1)$  

m is slope - no changes
x1 and y1 make the starting point - switch order and signs

What is starting point of
 $y-4=\frac{1}{2}(x-3)$  

Slope = 1/2
starting point (3,4)

Multiple Choice

What is the slope of

 $y-2=5(x-7)$  

• 2

• 5

• 7

• -2

Multiple Choice

What is the starting point of

 $y-2=5(x-7)$  

• 2, 7

• 7, 2

• -2, -7

• -7,- 2

Multiple Choice

What is the slope of

 $y+3=\frac{1}{5}(x+4)$  

• 3

• 4

• 1/5

• -3

Multiple Choice

What is the starting point of

 $y+3=\frac{1}{5}(x+4)$  

• 3, 4

• 4, 3

• -3, -4

• -4, -3

Parallel Lines have SAME slope

Multiple Choice

True or False

Parallel lines have same slopes.

• True

• False

Multiple Choice

What is the parallel slope of

 $y-4=3\left(x+2\right)$  

• -4

• 3

• -1/3

• 4

Multiple Choice

Are these lines parallel?
 $y=2x+3$  
 $y=-2x+3$  

• yes

• no

Multiple Choice

Are these lines parallel?

 $y=\frac{1}{2}x+3$  
 $y=\frac{1}{2}x-3$  

• yes

• no

Perpendicular Lines have OPPOSITE RECIPROCAL slopes.

Has to change.

Flip it and switch signs.

Opposite Reciprocal 

 $\frac{2}{5}\ \ \ is\ -\frac{2}{5}$  
another example
 $-3\ \ \ is\ \frac{1}{3}\ \$  

Multiple Choice

What is the opposite reciprocal of

 $\frac{3}{5}$  

• 3/5

• 5/3

• -3/5

• -5/3

Multiple Choice

What is the opposite reciprocal of 2?

• 2/1

• 1/2

• -2/1

• -1/2

Multiple Choice

Which lines have the OPPOSITE RECIPROCAL slopes?

• Parallel

• Perpendicular

Multiple Choice

What is the perpendicular slope of

 $y-7=\frac{2}{3}\left(x+5\right)$  

• 3/2

• -3/2

• 2/3

• -2/3

Multiple Choice

Are the the two lines perpendicular?

 $y=2x+4$ 
 $y=-2x-4$  

• yes

• no

Multiple Choice

Are the two lines perpendicular?

 $y=5x+4$   $y=-\frac{1}{5}x+3$  

• Yes

• No