how do I find x intercept for "3y = 9x + 15"? I found the y intercept, I just need help with the x.

Question

jhannybean · Answer

Same method as before

anonymous · Answer

3y = 9x + 15
3 x 0= 9x + 15
0= 9x + 15
-15         -15
-15= 9x

No what? @Jhannybean

jhannybean · Answer

Now isolate the x by dividing both sides of the equation by 9

anonymous · Answer

But that doesn't make any sense. -15 / 9 = -1.666continued

jhannybean · Answer

Keep it fractional. Just reduce $-\dfrac{15}{9}$

anonymous · Answer

so how would I plot that?

anonymous · Answer

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anonymous · Answer

yes or no?

jhannybean · Answer

3y = 9x + 15

when you solved for y, you got y=5, yes? 

your point here became (0, 5) 

and when you set y to 0, you got (-15/9 , 0)  or (-1.666... , 0) 

You just have to kind of eyeball the -1.66... 

it's a little bit past the -1.5 but no where near the -2

jhannybean · Answer

I was wrong, in stating what your points are, i would prefer writing my point as \(-15/9, 0) but in graphing it, -1.6 is fine.

jim_thompson5910 · Answer

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jim_thompson5910 · Answer

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