SOLUTION: write the equations of the line passing through each given pairs of points write results in slope interceptform please. I need to know how to do this correctly this is what I got

Question 57955: write the equations of the line passing through each given pairs of points write results in slope interceptform please. I need to know how to do this correctly
this is what I got (-1,3) and (4,-2) I wrote for the first one y=1x+2 am I correct?
(2,-30 and (2,4)
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
write the equations of the line passing through each given pairs of points write results in slope intercept form please. I need to know how to do this correctly
:
this is what I got (-1,3) and (4,-2) I wrote for the first one y=1x+2 am I correct?
:
Will check by doing the problem:
:
Find the slope: m = (y2-y1)/(x2-x1):
x1 = -1, y1 = 3; x2 = 4, y2 = -2
:
m = = = -1 is slope
:
Using the point slope: y - y1 = m(x - x1)
y - 3 = -1(x - (-1))
y - 3 = -1(x + 1)
y - 3 = -1x - 1
y = -1x - 1 + 3
y = -x + 2
:
You were very close, it should be y = -1x + 2
:
:
Do the same with these
(2,-30 and (2,4)
:
Find the slope: m = (y2-y1)/(x2-x1):
x1 = 2, y1 = -30; x2 = 2, y2 = 4
:
m =
:
WE can stop right here because 2-2 put a 0 in the denominator, slope is undefined. If you plotted this on a graph it would be vertical line going through x = 2, for all values of y.
:
Hope this helps you

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