if a graph is decreasing on (-∞,-1) and increasing on (-1,∞), what happens at x = -1?\na. the graph has a…

if a graph is decreasing on (-∞,-1) and increasing on (-1,∞), what happens at x = -1?\na. the graph has a turning point, which is a relative maximum\nb. the graph crosses the x - axis\nc. the graph has a point of inflection\nd. the graph has a turning point, which is a relative minimum

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