Which graph represents a density curve, and why? graph A only, because the area under the curve
equals 1, and the curve is above the horizontal axis
graph B only, because the area under the curve
equals 2, and the curve is above the horizontal axis
both graph A and graph B, because both curves are
above the horizontal axis, and their areas are
positive
neither graph A nor graph B, because, even though
both curves are above the horizontal axis, their
areas are not the same value