Posted by Celina on Thursday, December 18, 2008 at 5:01pm.
Here's the question I'm having trouble with:
Tell how you would identify the intercepts for the graph of the equation:
3x + 6y = 18
I'm not exactly sure how you would find the intercepts from this equation.
Algebra - RED FIRE, Thursday, December 18, 2008 at 5:06pm
would you know how to find them if you put it into y=mx+b form?
Algebra - Celina, Thursday, December 18, 2008 at 5:10pm
Yes! I see, I didn't really think of it that way until after I posted the message. Thank you!
Algebra - RED FIRE, Thursday, December 18, 2008 at 5:11pm
lol wow i actually helped ?!
i was just guessing .. im only in grade 11 anyways
Algebra - Reiny, Thursday, December 18, 2008 at 5:11pm
If they are written in the form you have, it is often very easy to find
remember to find the x-intercept you let y=0 and to
find the y-intercept you let the x=0
of course letting some variable equal to zero makes that term disappear.
so to let x=0, block out the x term with your little finger, what do you see?
6y = 18, then y = 3
for the x-intercept, block out the y-term with your little finger and ...
x = 6
this works really neat if the x and y coefficients both divide evenly into the constant
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