Write an equation in standard form of the line that passes through (1.1) and (9,7).
Z Zea New member Joined Jan 26, 2012 Messages 2 Jan 26, 2012 #1 Write an equation in standard form of the line that passes through (1.1) and (9,7).
W willmoore21 Junior Member Joined Jan 26, 2012 Messages 75 Jan 26, 2012 #2 Zea said: Write an equation in standard form of the line that passes through (1.1) and (9,7). Click to expand... I'm assuming that (1.1) is meant to be (1,1) before I start to explain this. First you have to assume that (1,1) is (x1,y1) and (9,7) is (x2,y2). You can use this to work out the slope, m = (y2-y1)/(x2-x1) = (7-1)/(9-1) = 6/8 = 3/4. Now the point slope form of a linear equation is: y-y1 = m(x-x1), now substituting in, y-1 = 3/4(x-1). Hope this helps.
Zea said: Write an equation in standard form of the line that passes through (1.1) and (9,7). Click to expand... I'm assuming that (1.1) is meant to be (1,1) before I start to explain this. First you have to assume that (1,1) is (x1,y1) and (9,7) is (x2,y2). You can use this to work out the slope, m = (y2-y1)/(x2-x1) = (7-1)/(9-1) = 6/8 = 3/4. Now the point slope form of a linear equation is: y-y1 = m(x-x1), now substituting in, y-1 = 3/4(x-1). Hope this helps.
