Slope of a line

Slope of a line

Working with equations

Here is the line 

 $2x+3y+7=0$  

• The equation is in the form  $ax+by+c=0$ 

• For this line we can see that:

•  $a=2$  

•  $b=3$  

• The slope is  $-\frac{2}{3}$  

Here is the line 

 $x+5y+4=0$  

• The equation is in the form  $ax+by+c=0$ 

• For this line we can see that:

•  $a=1$  

•  $b=5$  

• Find the slope of this line

• Slope =  $-\frac{1}{5}$  

Fill in the Blanks

Another line has the equation  $3x+1y+6=0$   

It is written in the form  $ax+by+c=0$ .

Fill in the number:
 $a=$ ?           

Fill in the Blanks

The line has the equation  $3x+1y+6=0$   

It is written in the form  $ax+by+c=0$ .

Fill in the number:
  $a=3$       $b=$  ?           

Find the slope of the line $3x+1y+6=0$  

Write the answer in your copy! 

Write the equation next to it.

Fill in the Blanks

Another line has the equation  $1x+2y-4=0$   

It is written in the form  $ax+by+c=0$ .

Fill in the number:
 $a=$ ?           

Fill in the Blanks

The line has the equation  $1x+2y-4=0$   

It is written in the form  $ax+by+c=0$ .

Fill in the number:
  $a=1$       $b=$  ?           

Find the slope of the line $1x+2y-4=0$  

Write the answer in your copy! 

Write the equation next to it.

Fill in the Blanks

Another line has the equation  $2x-3y+1=0$   

It is written in the form  $ax+by+c=0$ .

Fill in the number:
 $a=$ ?           

Fill in the Blanks

The line has the equation  $2x-3y+1=0$   

It is written in the form  $ax+by+c=0$ .

Fill in the number:
  $a=2$       $b=$  ?   
Hint: notice that the number in front of y is negative. This means b will also be negative!        

Find the slope of the line $2x-3y+1=0$  

Write the answer in your copy! 

Write the equation next to it.

Open Ended

What do you notice?