tolong nmr 3 dan 4 donggg

3 . •• Persamaan garis lurus ••

titik : ( 0 , 7)

y - y1 = m (x - x1)
y - 7 = 5 ( x - 0)
y - 7 = 5x
y = 5x + 7 ( C)

4. •• Fungsi ••

f : x --> x + 1

daerah hasil : {( 2 +1 ) , (4 + 1) , ( 6+1) (8 + 1 )}
: { 3,5,7,9 }

( B)

Matematika VIII SMP
→→ PGL dan Fungsi ←←

Pembahasan :
3||

y - y1 = m(x - x1)
y - 7 = 5(x - 0)
y - 7 = 5x
y = 5x + 7

4||

Daerah asal (2,4,6,8)

x + 1
(X = 2) —» 2 + 1 = 3
(X = 4) —» 4 + 1 = 5
(X = 6) —» 6 + 1 = 7
(X = 8) —» 8 + 1 = 9

Daerah Hasil = {3,5,7,9}