No 15 dan 16 tolong dibantu caranya

15) cari pakai fungsi garis lurus juga bisa
x = jarak
y = tarif
titik 1 (x1,y1) = (2,11)
titik 2 (x2,y2) = (4,16)
m = y2-y1 / x2-x1 = 16-11 / 4-2 = 5/2
y - y1 = m(x - x1)
y - 11 = 5/2(x - 2)
y = 5/2x - 5 + 11
y = 5/2x + 6
x = 38
y = (5/2)38 + 6 = 95 + 6 = 101
tarif Rp 101.000
tidak ada di pilihan

16) Ay = Bx + c
gradien = m = B/A
3y = 9x + 6
m = 9/3 = 3