Help. I have a test on this today. Write an equation in slope intersect form from given info:
(-1,2) // to y=1/2x-3. Then answer what is the m= and the //m=

Question

Help.  I have a test on this today.   Write an equation in slope intersect form from given info:
(-1,2) // to  y=1/2x-3.  Then answer what is the m=    and the  //m=

anonymous · Answer

@rosimary Do you know slope intersect form?

anonymous · Answer

y=mx+b

anonymous · Answer

I think I figured out.  1 point is already given in slope int form.  So the additional point I have to put in same way.  So I use point slope form of y-y1=m(x-x1).    So I y-2=1/2(x--1)  then change to 2(y-2)2*1/2(x+1)  then work out equation and leaves me with y=1/2x+5.  Which means the //m=1/2 ... YES?

anonymous · Answer

m = 1/2
-> 2 = 1/2 (-1 ) + b
=> b = 2 + 1/2 = 5/2
Thus y = x/2 + 5/2

anonymous · Answer

That's right .... Thanks for catching that.  Did I get the slope right?

anonymous · Answer

and the perpendicular one I just reverse slope and make into opposite whether (-) or (+) right?

anonymous · Answer

Great.  Thank you.  I think it was the way the question looked that it confused me.

anonymous · Answer

Observe the way I solving, there's no confusing with just 3 short lines !

anonymous · Answer

ok