OG详解-OG8 数学2 Q8

Choice B is correct. The y-intercept of the graph of a function in the xy-plane is the point on the graph where x = 0. It′s given that f(x)= x-2. Substituting 0 for  x in this equation yields f(0)= (0)-2, or f(0)=-2. Since it′s given that y= f(x), it follows that y=-2 when x = 0. Therefore, the y-intercept of the graph of y= f(x) in the xy-plane is (0, -2).