A line has a slope of 7 and includes the points ( - 6, - 4) and ( - 4,c). What is the value of c?
[ - 4 - c ] / [ - 6 - - 4 ] = 7
[ - 4 - c ] / [ -2] = 7 multiply both sides by -2
-4 - c = - 14 add c, 14 to both sides
10 = c