Find the slope of the line tangent to the graph of f(x) = 4 - x at x = 2

Answer 1

f(x) has a constant slope =-1, at every x value, including x=2

if a linear equation is solved for y, the slope = the coefficient of the x term, which in this problem is implicitly = -1

the tangent line is the given line. they are one and the same

y=4-x