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f(-2)?
-4a+b=13
3a+b =-1
dieleminasi
-7a = 14
a = -2
cara mencari b =
ax+b=
-4x-2+b=13
8+b=13
b=13-8
b=5
f(-2)?
-2x-2+5=
4+5= 9 (b)
39. rumus = -x/y
m1 = -2/-3
karena tegak lurus harus mencari gradien m2 jika dikalian m1 hasilnya -1
-2/-3 = 2/3
2/3 x -3/2 = -6/6 = -1
jawabannya -3/2 jawabannya (a)
maaf jika salah
39. y = 2/3 x - 3, garis yang tegak lurus mempunjyai gradien m = - 3/2 (a)