Can some explain how to do this:

Question

anonymous · Answer

Write the equation of a line that is
             parallel to 9x + 3y = 15 and goes through the point (–1, 2)

anonymous · Answer

first you need the slope of $9x+3y=15$ so you can use the point slope formula 
do you know what that slope is?

anonymous · Answer

point slope=
y=mx+b

anonymous · Answer

yes, and you need $m$
to you know the slope of $9x+3y=15$ ? you need that number

anonymous · Answer

how thogh?

anonymous · Answer

you can do it by solving for $y$:
$$9x+3y=15$$
$$3y=-9x+15$$
$$y=-3x+5$$ so the slope is $-3$

anonymous · Answer

I think I know it
can I show u guys

anonymous · Answer

satellite73 I know what r u doing but she have to do focus in class more
3y=-9x+15 write it y=mx+b and than look for b2 of the second equation y2 which have the same m using this information. 
y(-1)=2

anonymous · Answer

or you can remember (memorize) that the slope of $ax+by=c$ is $-\frac{a}{b}$

anonymous · Answer

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