销售量/箱 | 4 | 5 | 6 | 7 | 8 | … |
销售额/元 | 240 | 300 | 360 | 420 | 480 | … |
(1)写出几组销售额与相对应销售量的比,并比较比值的大小.
(2)这个比值表示什么?
(3)雪糕的销售额与销售量成正比例关系吗?为什么?
(4)在下图中描出表示雪糕的销售额与对应销售量的点,然后把这些点按顺序连起来.
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