您所在的当前位置：初中数学试题 >

正比例函数定义

> （1）一次函数是正比例函数______．（请填写：“正确”或“错误”）（2）正比例函数是一次函数______．（请填写：“正确”或“错误”）（3）x+2y=5是一次函数______．（请填写：“正确”或“错误”）（4）2y-x=0是正比例函数______．（请填写：“正确”或“错误”）

问题：

发布时间：2024-09-09

（1）一次函数是正比例函数．（请填写：“正确”或“错误”）
（2）正比例函数是一次函数．（请填写：“正确”或“错误”）
（3）x+2y=5是一次函数．（请填写：“正确”或“错误”）
（4）2y-x=0是正比例函数．（请填写：“正确”或“错误”）

参考答案：

提问用户：j6***Hzi

可能感兴趣的题目：

1 按照现代决策理论，决策过程的主要阶段可以分为(　　)。 A 信息收集、方案设计、方案拟定、方案选择 B 信息收集、方案设计、方案评价、方案选择 C 信息收集、方案设计、方案初选、方案终选 D 信息收集、方案设计、方案优选、方案论证
2 测量地物反射波谱特性获得地物波谱反射特性曲线，可以用于（）。 A 遥感传感器光谱响应设计 B 选择遥感光谱段 C 地物分类识别 D 选择合适的影像获取时间 E 选择影像分辨率
3 与如图轮廓代表的省相接壤的国家是 [ ] A．蒙古 B．俄罗斯 C．朝鲜 D．越南
4 食用海带、紫菜等海产品可以补碘，这里的碘指的是 A.元素 B.单质 C.分子 D.原子
5 根据如图所示的计算程序，若输入的值x =－1，则输出的值y =" _" _ ．
6 某投资者看好某只股票，计划3个月后对该股票进行增持，但希望可将股票价格锁定在现价水平，于是该投资者与证券公司订立股票收益互换协议。若实际股价和现价出现偏离，则（）。 A 若实际股价低于现价，则投资者自行购买 B 若实际股价高于现价，则投资者与证券公司的协议不执行 C 若实际股价低于现价，则证券公司向投资者支付差价收益 D 若实际股价高于现价，则证券公司向投资者支付差价收益
7 You probably know you should say ‘please’ and ‘thank you’ at restaurants. You probably know the rules of a library. You know you should respect and be nice to your classmates. But do you have music manners? Keep it down! You have to notice the volume of your music. You should not play your music so loud that everyone around you can hear it. Some people might even get angry. Usually, when you play the music loud on an MP3 player, other people can’t hear the words of the song. They just hear a loud sound. Not one wants to listen to this. Very loud music can also be bad for your ears, so even if you are alone when listening to your MP3 player, you shouldn’t have it turned up too high. Take them off! You need to know when to turn your MP3 player off and put it away. Libraries and schools don’t allow MP3 players. There are other places, like museums, that don’t have rules, but it would be rude to have your MP3 player on. Sometimes, it just doesn’t make sense to listen to your MP3 player at event. Why would you listen to music at a play, a movie or a sporting event? You would miss what is going on and others would wonder why you even came. Take one out! Sometimes it’s okay just to take out one earphone and not the other. Imagine you are listening to your MP3 player when someone asks you the way. It would not be rude to take out one earphone, tell him the way, and put back the earphone and continue listening. You can also do this when you order food at a fast-food restaurant or when you answer the telephone and it’s not for you. It’s your choice! There are times when you need to decide what is best. For example, some people can listen to music on their MP3 Players when read books, while others think it is disturbing. In cases like this, you need to do what seems right for youThe underlined word ‘volume’ in paragraph two probably means _____We should turn down the music when we are alone because loud music _____We can take one earphone out when we _____It’s all right to use our MP3 player in _____What can be the best title of this passage? the type of music,the amount of a sound,the length of a song,the colour of an MP3 player,the type of music,the amount of a sound,the length of a song,the colour of an MP3 player,is not enjoyable,makes us tired,is bad for MP3 players,hurts our ears,is not enjoyable,makes us tired,is bad for MP3 players,hurts our ears,show others the way,talk to fiends on the phone,watch a sporting event,have dinner with our parents,show others the way,talk to fiends on the phone,watch a sporting event,have dinner with our parents,schools,libraries,restaurants,museums,schools,libraries,restaurants,museums,Music Lovers,Music Manners,MP3 Players,MP3 Earphones,Music Lovers,Music Manners,MP3 Players,MP3 Earphones
8 （1）解方程： x x-1 - 2 x =1．（2）先化简再求值： a-2 a+3 ÷ a2-4 2a+6 - 5 a+2 ．其中a=7．
9 下列各项中不属于社会消费品零售范围的是(　　)。 A 售给社会集团的各种办公用品 B 售给来华的外国人、华侨、港澳台同胞的消费品 C 出售作为转卖用的商品 D 农民售给非农业居民和社会集团的商品
10 【题文】2013年3月22日是第二十一届“世界水日”，宣传的主题为“节约保护水资源，大力建设生态文明”．某校化学兴趣小组的同学对黄河的水质状况进行了一些实验与探究．（1）王涛同学欲用pH试纸测定黄河水的酸碱度．请你帮他写出具体的操作步骤：。（2）下列做法不会造成黄河水污染的是（填字母序号）． A．随意弃置废旧电池 B．含二氧化硫的工业废气任意排放 C．工业废水处理达标后再排放 D．含磷洗衣粉的生活用水任意排放（3）节约用水从我做起，请举一例生活中节约用水的措施：．