Question 604190: Find an equation of the line that passes through (6,6) and (-6,-6). Write the answer in slope-intercept form, using x as the independent variable.
Answer by alicealc(293)   (Show Source):
You can put this solution on YOUR website! assume the equation is y = mx + c
pass through (6,6):
6 = 6m + c
pass through (-6,-6):
-6 = -6m + c
use elimination procedure:
6 = 6m + c
-6 = -6m + c
------------- (-)
12 = 12m
m = 12/12 = 1
6 = 6m + c
6 = 6*1 + c
6 = 6 + c
6 - 6 = c
0 = c
so the line equation for the problem is y = x
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