slope of a line *

[tamiatha]

find the slope of a line that passes through (2,4) and (-7,8)
slope = 8-4/-7 - 2
my solution is -4/5
am i correct

 

[Loren]

Re: slope of a line

find the slope of a line that passes through (2,4) and (-7,8)
slope = 8-4/-7 - 2 <<< You should write this as (8-4)/(-7-2).
my solution is -4/5 <<< Something wrong here. What is value of "-7-2"?
am i correct

 

[tamiatha]

Re: slope of a line

-7 - -2 = -5
what is wrong

 

[Mrspi]

Re: slope of a line

-7 - -2 = -5
what is wrong

In the "slope" formula, you have -7 - 2

That is NOT the same thing as -7 - (-2).....

-7 - 2 is the same thing as -7 + (-2).................

 

[tamiatha]

Re: slope of a line

i donot understand

 

[Denis]

Re: slope of a line

i donot understand

If you do not understand that -2 - 7 = -9, then you need classroom help.

 

[stapel]

i donot understand

To learn about negative numbers, try here.

But if you really don't understand the difference between adding -2 and subtracting -2, then you probably do need some intensive one-on-one assistance. :shock: