點(diǎn)P與點(diǎn)N關(guān)于y軸對(duì)稱,而點(diǎn)N與點(diǎn)M(-4,3)關(guān)于原點(diǎn)對(duì)稱,則點(diǎn)P的坐標(biāo)是( )
A.(-4,-3)
B.(3,-4)
C.(4,-3)
D.(4,3)
【答案】分析:根據(jù)點(diǎn)N與點(diǎn)M(-4,3)關(guān)于原點(diǎn)對(duì)稱,又有關(guān)于原點(diǎn)對(duì)稱的點(diǎn)的坐標(biāo)是橫標(biāo)和縱標(biāo)都互為相反數(shù),得到N的坐標(biāo),根據(jù)點(diǎn)P與點(diǎn)N關(guān)于y軸對(duì)稱,又有關(guān)于縱軸對(duì)稱的兩個(gè)點(diǎn)的坐標(biāo)橫標(biāo)相反,縱標(biāo)相同,得到P點(diǎn)的坐標(biāo).
解答:解:∵點(diǎn)N與點(diǎn)M(-4,3)關(guān)于原點(diǎn)對(duì)稱,
∴點(diǎn)N的坐標(biāo)是(4,-3)
∵點(diǎn)P與點(diǎn)N關(guān)于y軸對(duì)稱,
∴點(diǎn)P的坐標(biāo)是(-4,-3)
故選A
點(diǎn)評(píng):本題是一個(gè)關(guān)于坐標(biāo)軸和坐標(biāo)原點(diǎn)對(duì)稱的點(diǎn)的坐標(biāo)的特點(diǎn),解題時(shí)注意數(shù)字的符合,這是一個(gè)基礎(chǔ)題,一般是一個(gè)題目的一小部分.