find the slope of a line that passes through
(-2, -3) and (1, 1)
1/3
1
2
4/3

Question

find the slope of a line that passes through 
(-2, -3) and (1, 1) 
1/3 
1
2
4/3

anonymous · Answer

Use the slope formula$$m = \frac{ y_2 - y_1 }{ x_2-x_1 }$$where x_2 and y_2 represents one coordinate and the x_1 and y_1 represents the 2nd coordinate. Slope = rise over run right?

anonymous · Answer

yes its rise over run

anonymous · Answer

since your point  (1,1) is higher than your point (-2,-3) on a graph. use the (1,1) as your x_2, and y_2 and the other point (-2,-3) as your x_1 and y_1

anonymous · Answer

sooo  |dw:1385526239897:dw|

anonymous · Answer

I don't understand what I do next

anonymous · Answer

@agent0smith

jim_thompson5910 · Answer

$$\large m = \frac{ y_2 - y_1 }{ x_2-x_1 }$$


$$\large m = \frac{ 1 - (-3) }{ 1 - (-2) }$$


$$\large m = ???$$

anonymous · Answer

so I do -3 x -3 first I guess which = 9 then 1 - 9 = -8
-2 x -2 = 4 1 - 4 = -3 righttttttttttttttttt????

anonymous · Answer

then 8 divided by 3?

agent0smith · Answer

See jim's post, follow it slowly and carefully. Not sure why you're doing -3*-3 and -2*-2, there's no multiplication involved.

anonymous · Answer

the (-3) in it doesn't that mean your supposed to multiply

agent0smith · Answer

1-(-3) means 1 minus negative 3

jim_thompson5910 · Answer

also, 1 - (-3) is really the same as 1 + 3

agent0smith · Answer

What makes you think (-3) means you multiply...? Make sure you realize what mistake you are making there...

anonymous · Answer

ok so 1 - -3 = 4

agent0smith · Answer

Correct

anonymous · Answer

1 - -2 = 3

anonymous · Answer

the reason I thought it was multiplication was because commonly with pemdas and sorts the parenthesis can mean you multiply the things inside

anonymous · Answer

so 4/3

agent0smith · Answer

But still... what would you multiply it by (-3).. there is nothing other than a -3 in there. There's nothing to multiply it by.

agent0smith · Answer

(-3) does not mean (-3)^2

anonymous · Answer

I thought it was sorta like -3^ with the exponents and I though oh it must multiply by itself

agent0smith · Answer

Make sure you don't continue thinking that... you will make a lot of mistakes if you do. If there's no exponent, don't assume there's one supposed to be there.

anonymous · Answer

ya sorry math confuses me haha :) thank you for helping me though I really appreciate it

agent0smith · Answer

And yes, 4/3 is correct :)