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April 20, 2014

Homework Help: algebra

Posted by kevin on Monday, September 17, 2012 at 11:55am.

I have a few questions that I don't understand hope someone can help.

1)write an equation of th line, in point slope form, that passes through the two given points. (-17,8),(3,-2)
I figured (y-8)=-2(x+17) not sure

2) the graph of g(x) is f(x) vertically compressed by a factor of 1/7 and reflected in the x-axis what is the function rule for g(x)given f(x)=2x.
not sure about this one

3)determine whether y varies directly with x if so find the constant of variation k and write the equation.
x y
7 11
8 13
9 15
10 17
I know you start with y=kx but then I'm lost.

not looking for just answers but if someone can explain I'd appreciate it

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