ÌâÄ¿ÄÚÈÝ
£¨2012•ÕØÇìһģ£©¸ßÈýij°àѧÉúÿÖÜÓÃÓÚÊýѧѧϰµÄʱ¼äx£¨µ¥Î»£ºÐ¡Ê±£©ÓëÊýѧ³É¼¨y£¨µ¥Î»£º·Ö£©Ö®¼äÓÐÈçÏÂÊý¾Ý£º
¸ù¾Ýͳ¼Æ×ÊÁÏ£¬¸Ã°àѧÉúÿÖÜÓÃÓÚÊýѧѧϰµÄʱ¼äµÄÖÐλÊýÊÇ
x | 24 | 15 | 23 | 19 | 16 | 11 | 20 | 16 | 17 | 13 |
y | 92 | 79 | 97 | 89 | 64 | 47 | 83 | 68 | 71 | 59 |
16.5
16.5
£» ¸ù¾ÝÉϱí¿ÉµÃ»Ø¹é·½³ÌµÄбÂÊΪ3.53£¬½Ø¾àΪ13.5£¬ÈôijͬѧÿÖÜÓÃÓÚÊýѧѧϰµÄʱ¼äΪ18 Сʱ£¬Ôò¿ÉÔ¤²â¸ÃÉúÊýѧ³É¼¨ÊÇ77
77
·Ö£¨½á¹û±£ÁôÕûÊý£©£®·ÖÎö£º°Ñͼ±íÖиø³öµÄѧϰʱ¼äÊý¾ÝÖØÐÂÓÉ´óµ½Ð¡ÅÅÁУ¬ÇóÖмäÁ½ÊýµÄƽ¾ùÊý¿ÉµÃ¸Ã×éÊý¾ÝµÄÖÐλÊý£»Óɸø³öµÄ»Ø¹é·½³ÌµÄбÂÊΪ3.53£¬½Ø¾àΪ13.5£¬Ö±½Óд³öÏßÐԻع鷽³Ì£¬Ôڻع鷽³ÌÖÐÈ¡x=18Ëã³ö
µÄ½üËÆÖµ£¬¼´¿ÉÔ¤²âÿÖÜÓÃÓÚÊýѧѧϰµÄʱ¼äΪ18 СʱµÄѧÉúµÄÊýѧ³É¼¨£®
? |
y |
½â´ð£º½â£º½«Ñ§Ï°Ê±¼äÖØÐÂÅÅÁÐΪ£º24£¬23£¬20£¬19£¬17£¬16£¬16£¬15£¬13£¬11
¿ÉµÃÖÐλÊýÊÇ
=16.5£»
ÓÉÒÑÖªµÃ»Ø¹é·½³ÌΪ
=3.53x+13.5
µ±x=18ʱ£¬
=3.53¡Á18+13.5=77.04¡Ö77£®
¹Ê¸ÃͬѧԤ¼Æ¿ÉµÃ77£¨·Ö£©×óÓÒ£®
¹Ê´ð°¸Îª16.5£»77£®
¿ÉµÃÖÐλÊýÊÇ
17+16 |
2 |
ÓÉÒÑÖªµÃ»Ø¹é·½³ÌΪ
? |
y |
µ±x=18ʱ£¬
? |
y |
¹Ê¸ÃͬѧԤ¼Æ¿ÉµÃ77£¨·Ö£©×óÓÒ£®
¹Ê´ð°¸Îª16.5£»77£®
µãÆÀ£º±¾Ì⿼²éÁËÏßÐԻع鷽³Ì£¬¿¼²éÁËÒ»×éÊý¾ÝµÄÖÐλÊýµÄÇ󷨣¬ÊÇ»ù´¡µÄ¸ÅÄîÌ⣮

Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿