Slope

 

There are two formulas we can use to find the slope of a line.   

Formula 1:

y = mx + c

m stands for the  Slope 

c is where the line cuts y-axis  

  

If the equation of a line is given we can use this formula to find the slope.  We just have to rearrange the equation to suit the formula.

 

Example:

Find the slope of the line L:4y - x = 13     

 y = mx+c » write out the formula
» write out the line
» get y on the left side     
  » get y on its own on the left
      » slope is value in front of x

         

Formula 2:

                            

This formula is used when we are given two points a(x1,y1) & b(x2,y2) and asked to find the slope.

 

Example:

Find the slope of a(-1,3)  and b(7,5)

a(-1,3)    b(7,5) » write down values
(x1,y1)    (x2,y2)      of (x1,y1) & (x2,y2)       
» write out the formula
» sub in the values
» work it out
» slope  

             

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