Substitute the values in
y = mx + c to have
m + c = 1 ....... (i)
3m + c = -1 ............(ii)
Subtract (ii) from (i)
-2m = 2;
m =-a
but m + c = 1
-1 + c = 1;
c = 2
johnmulu answered the question on June 8, 2017 at 08:32
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