intercepts!

[warmweather]

my equation is 300 - 100000 + 100x /x

I need the X INT, Y INT,

I solved and let y=o and got an xint of(997,0)
and let x=0 and got a y int of 90,-99700)

i am very confused someone please help

 

[thedarjeeling]

If you let x = 0, how did you divide by 0?

If you plug in x = 997 to the equation, does y really equal 0? Definition of x intercept is when you plug in x, you get a y value of zero.

 

[warmweather]

so really there is no y int?
but is my x int right?

 

[thedarjeeling]

I think everything is divided by x, not just the last term. That's how he was getting a horizontal asymptote of y = 100.

Again, there couldn't be an y intercept at x = 0, either the way the problem is stated, because you can't divide by 0.

There is however an x intercept at y = 0.

 

[warmweather]

yes I understand the y int now because I cant devide by 0.
when I do the x int tho i get
300 - 100000 +100x
-99700 = 100x, divide both by -100 = 997?

 

[thedarjeeling]

If you have the equation 0 = 300 - 100000 + 100 x,

Then how did you get -99700 = 100x?

Check algebra ^_^

 

[warmweather]

because you isolate x on one side, and 300-100000 is -99700 and than you need to divide by 100

 

[thedarjeeling]

What I'm getting at is what happens when you plug in -99700? Does the equation become 0 as it should? Did you get the sign right? Did you isolate x properly?