# S Ɣ

#### QDƂ̃Ot

𓚂\ɂꍇ́Ã{^ĂB

(1) ̕\ł́AɔႵĂ܂B\̋󗓂𕔕𖄂߂܂傤B
(1)
 P Q R S PQ QS PQ U

(2)
 P Q R S U |PQ |U |Q

(3)
 |W |S |Q P Q |P |S W

(4)
 |S |Q S W QO PO |PO |Q

(1)
 P Q R S PQ QS PQ W U Q

(2)
 P Q R S U |PQ |U |S |R |Q

(3)
 |W |S |Q P Q |P |Q |S W S

(4)
 |S |Q S W QO PO QO |PO |T |Q

(2) ̎̂AɔႷ̂Iт܂傤B
①$y=\dfrac {7} {x}$      ②$y=-\dfrac {9} {x} \dfrac {} {}$     ③$y=\dfrac {x} {5}$

④$xy=6$      ⑤$y=\dfrac {1} {x} +1$     ⑥$y=\dfrac {1} {x-1}$

⑦$\dfrac {y} {x} =-8$     ⑧$1=\dfrac {2} {xy}$      ⑨$x=\dfrac {4} {y}$

$y=\dfrac {a} {x}$   i$a$  ͂OłȂ萔 jƕ\ƂɔႵ܂B

①$y=\dfrac {7} {x}$      ̎ł
②$y=-\dfrac {9} {x}$     ̎ł
③$y=\dfrac {x} {5}$      ̎ŁA̎ł͂܂
④$xy=6$      ό$y=\dfrac {6} {x}$  ƂȂ蔽̎ł
⑤$y=\dfrac {1} {x} +1$    ̎ł͂܂
⑥$y=\dfrac {1} {x-1}$     ̎ł͂܂
⑦$\dfrac {y} {x} =8$      ό$y=-8x$  ƂȂA̎ł
⑧$1=\dfrac {2} {xy}$      ό$y=\dfrac {2} {x}$  ƂȂA̎ł
⑨$x=\dfrac {4} {y}$      ό$y=\dfrac {4} {x}$  ƂȂA̎ł

①C②C④C⑧C⑨

(3) ɔႷ邱Ƃ܂傤B܂ÂƂ̔萔܂傤

(1) ʐςPQ$cm^2$  ł钷̉̒Ac̒Ƃ

(2) PO̓̂AŐi񂾂Ƃɂ鎞ԂԂƂ

(3) PTÕ[vƂ̂P{̒Ƃ

(4) UOℓ鐅ɁAℓꂽƂAςɂȂ܂Ƃ

(1)$xy=12$  Ȃ̂ŁA$y=\dfrac {12} {x}$
ɔႷB
萔͂PQ

(2)$xy=10$  Ȃ̂ŁA$y=\dfrac {10} {x}$
ɔႷB
萔͂PO

(3)$xy=150$  Ȃ̂ŁA$y=\dfrac {150} {x}$
ɔႷB
萔͂PTO

(4)$xy=60$  Ȃ̂ŁA$y=\dfrac {60} {x}$
ɔႷB
萔͂UO

(4) ɔႵȀ𖞂ƂA̎ŕ\܂傤B
(1)$x=4$  ̂Ƃ$y=3$

(2)$x=-5$  ̂Ƃ$y=6$

(3)$x=-6$  ̂Ƃ$y=3$

(4)$x=3$  ̂Ƃ$y=-12$

(1)$x=4$  ̂Ƃ$y=3$  Ȃ̂
$3=\dfrac {a} {4}$   $a=12$
$y=\dfrac {12} {x}$

(2)$x=-5$  ̂Ƃ$y=6$  Ȃ̂
$6=-\dfrac {a} {5}$   $a=-30$
$y=-\dfrac {30} {x}$

(3)$x=-6$  ̂Ƃ$y=3$  Ȃ̂
$3=-\dfrac {a} {6}$   $a=-18$
$y=-\dfrac {18} {x}$

(4)$x=3$  ̂Ƃ$y=-12$  Ȃ̂
$-12=\dfrac {a} {3}$   $a=-36$
$y=-\dfrac {36} {x}$

(5) ̖ɓ܂傤B
UOlōƂƁA傤ǂPQԂŏId܂B

(1) ̎dlōƂƁAԂŏIƂA̎ŕ\܂傤B

(2) ̎dXOlōƂƁAԂŏI܂B

(3) ̎dVԂROŏI邽߂ɂ́AlōƂ΂łB

(1) 萔$a$  ƂA$y=\dfrac {a} {x}$  ƂAĉĂ܂B
$x=60$  ̂Ƃ$y=12$  Ȃ̂
$12=\dfrac {a} {60}$   $a=720$
$y=\dfrac {720} {x}$

(2)$y=\dfrac {720} {x}$  $x=90$ āA
$y=\dfrac {720} {90} =8$
ijW

(3)$y=\dfrac {720} {x}$  $y=7.5$ āA
$7.5=\dfrac {720} {x} =8$
䂦$x=\dfrac {720} {7.5} =96$
ijXUl

(6) ̖ɓ܂傤B
PlɂTƁA傤ǂPQlɕP[L܂B

(1) ̃P[LPlƁA傤lɕƂāA̎ŕ\܂傤B

(2) PlɂSƁAlɕ邱Ƃł܂B

(1) P[L̐͂T×PQUO SłUOłB
$xy=60$
䂦$y=\dfrac {60} {x}$

(2)$y=\dfrac {60} {x}$  $x=4$  āA
$y=\dfrac {60} {4} =15$
ijPTl

(7) ̖ɓ܂傤B
n_an_܂ŎSOŐiނƂRԂ܂B

(1) n_an_܂ŎŐiނԂƂāA̎ŕ\܂傤B

(2) TOŐiނƁAn_an_܂łǂꂾ̎Ԃł傤B

(3) n_an_܂łUԂœB邽߂ɂ́AŐi߂΂悢łB

(1) n_Ƃan_̋$40\times 3=120$  PQOłB
$xy=120$
䂦$y=\dfrac {120} {x}$

(2)$x=50$  $y=\dfrac {120} {x}$  ɑ
$y=\dfrac {120} {50} =\dfrac {12} {5}$
ij$\dfrac {12} {5}$   iQԂQSj

(3)$y=6$  $y=\dfrac {120} {x}$  ɑ
$6=\dfrac {120} {x}$
$6x=120$
䂦$x=20$
ijQO

(8) ̖ɓ܂傤B
ݍĂ鎕ԂƂa܂B̐QO̎ԂT]ƁA̐̎Ԃa]Ƃ܂B

(1) ̎ŕ\܂傤B

(2) Ԃa̎̐PÔƂAԂT]ԂɎԂa͉]܂B

(1) Q̎Ԃ̎̐Ɖ]̐ς͓̂
$xy=20\times 5$
$xy=100$
䂦$y=\dfrac {100} {x}$

(2)$y=\dfrac {100} {x}$  $x=10$
$y=\dfrac {100} {10} =10$
ijPO]

(9) ̖ɓ܂傤B
ݍĂ鎕ԂƂa܂B̐UO̎ԂbV]ĂāA̐ł鎕Ԃab]Ă܂B

(1) ̎ŕ\܂傤B

(2) ԂRT]ԂɁAԂa͂QT]܂BԂa̎̐͂łB

(1) Q̎Ԃ̎̐ƖbƂ̉]̐ς̂
$xy=60\times 7$
$xy=420$
䂦$y=\dfrac {420} {x}$

(2) Ԃ`RT]ɂ́ART÷VTTb܂B
̂ƂAԂa͂QT]̂ŁAQT÷TTAbT]Ă܂B
$y=\dfrac {420} {x}$  $y=5$
$5=\dfrac {420} {x}$
䂦$x=84$
ijWS

(10) ̔̊֌W\Ot܂傤B
(1)$y=\dfrac {4} {x}$

(2)$y=\dfrac {9} {x}$

(3)$y=-\dfrac {3} {x}$

(4)$y=-\dfrac {12} {x}$

(5)$y=-\dfrac {5} {x}$

(1)$y=\dfrac {4} {x}$

(2)$y=\dfrac {9} {x}$

(3)$y=-\dfrac {3} {x}$

(4)$y=-\dfrac {12} {x}$

(5)$y=-\dfrac {5} {x}$

(11) ̐}͔̊֌W\OtłBꂼA̎ŕ\܂傤B
(1) _iQCSjʂB

(2) _i|QCQjʂB

(3) _i|SC|RjʂB

(4) _iQC|RjʂB

(5) _iRC|RjʂB

(1)$y=\dfrac {a} {x}$  $x=2$ C$y=4$  āA$4=\dfrac {a} {2}$
$a=8$
䂦$y=\dfrac {8} {x}$

(2)$y=\dfrac {a} {x}$  $x=-2$ C$y=2$  āA$2=-\dfrac {a} {2}$
$a=-4$
䂦$y=-\dfrac {4} {x}$

(3)$y=\dfrac {a} {x}$  $x=-4$ C$y=-3$  āA$-3=-\dfrac {a} {4}$
$a=12$
䂦$y=\dfrac {12} {x}$

(4)$y=\dfrac {a} {x}$  $x=2$ C$y=-3$  āA$-3=\dfrac {a} {2}$
$a=-6$
䂦$y=-\dfrac {6} {x}$

(5)$y=\dfrac {a} {x}$  $x=3$ C$y=-3$  āA$-3=\dfrac {a} {3}$
$a=-9$
䂦$y=-\dfrac {9} {x}$