Help me answer this question thx

What is the point-slope form of theequation for the line with a slope of-2 that passes through (1, 4)? a y + 1 = -2(x + 4)b y-1=-2(x-4)c y + 4 = -2(x + 1)d y - 4 = -2(x - 1)

Use the function f(x) is graphed below. the graph of the function to find, f(6). -2 -1 1 2

Can someone me out here and the tell me the greatest common factor