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)根据表中数据,描点后顺次连接各点,判断总价和质量是否成正比例关系,并说明理由。
(2)王奶奶买4.5kg鲜枣要花多少元?
(3)李奶奶买的鲜枣是王奶奶的4倍,她花的钱是王奶奶的几倍?
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