OG详解-OG1 数学2 Q8

Choice B is correct. They-intercept of the graph of a function in the xy-plane is the point on the graph where x = 0. It′s given that. Substituting 0 for x  in this equation yields. 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).

Choice A is incorrect and may result from conceptual or calculation errors. 
Choice C is incorrect and may result from conceptual or calculation errors. 
Choice D is incorrect and may result from conceptual or calculation errors.