每袋的质量(千克) | 20 | 25 | 30 | 40 | 50 | 60 |
装的袋数(袋) | 300 | 240 | 200 | 150 | 120 | 100 |
(1)表中有哪两种量?它们是相关联的量吗?
(2)装的袋数是怎样随着每袋的质量的变化而变化的?
(3)相对应的两种量的乘积是多少?
(4)它们是不是成反比例?为什么?
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