SOLUTION: could you explane to me why i got this marked wrong and how i can correct it? here's what they asked: "find the equation of a line that passes through the origin and the follow

Question 37187: could you explane to me why i got this marked wrong and how i can correct it?
here's what they asked: "find the equation of a line that passes through the origin and the following points." (2,-2)
my answer: y-(-2)=0(x-2)
:) thanx a bunch!!
Answer by fractalier(6550) (Show Source): You can put this solution on YOUR website!
To use the point-slope form, y - y1 = m(x - x1), you need a point AND the slope. The slope needs to be found in the usual way...m = (y2 - y1)/(x2 - x1) = (-2 - 0)/(2 - 0) = -1. NOW plug into the form above and get y - (-2) = (-1)(x - 2) and finally y = -x.
RELATED QUESTIONS
I am working on my math packet for school. I came across a section in it, in which i... (answered by Theo)

I have a percentage problem ....A school bus holds 57 students and is only 40% full. How... (answered by stanbon)

Please help me to solve this question: 9 + ? x 3/8 = 15 I tried to work out what ?... (answered by MathTherapy)

I just took a math test and was disappointed to see that I got a "C." I had worked very... (answered by chessace)

Hi I need help with a few math problems. I was sick when the teacher gave us the lesson.... (answered by jim_thompson5910)

I got this wrong. (3x-2y)^2= (that's the equation) 9x^2-4y^2 (this is what i got by... (answered by nerdybill)

Could you please explane to me how I find a line that is perpendicular to the line... (answered by solver91311)

How do you write this equation of ellipse in simple form? 3x^2 + 4y^2 + 8y=8... (answered by jim_thompson5910,stanbon,Earlsdon)

I have some problems I got wrong on my test. Please explain step by step what I should... (answered by stanbon,chitra)