每天烧煤的质量/吨 | 0 | 3 | 6 | 9 | 15 | 20 | … |
可烧的时间/天 | 0 | 30 | 15 | 10 | 6 | 4.5 | … |
(1)判断每天烧煤的质量和可烧的时间是不是成反比例,并说明理由。
(2)如果该工厂平均每天烧煤的质量是5吨,那么这批煤可烧多少天?
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