质量/kg | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | … |
总价/元 | 0 | 3 | 6 | 9 | 12 | 15 | 18 | 21 | 24 | … |
(1)总价和质量的比值是
(2)表中的两个量成
(3)点(2,6)表示购买
(4)张老师花了45元购买这种商品,她一共购买了
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