25 21 23 25 27 29 25 28 30 29
26 24 25 27 26 22 24 25 26 28
请填出表,并根据此表画出扇形统计图.
价格范围 | 商店数 | 所占百分数 |
20.5﹣22.5 | | |
22.5﹣24.5 | | |
24.5﹣26.5 | | |
26.5﹣28.5 | | |
28.5﹣30.5 | | |
合计 | | |
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2