No 18 pakai cara yaa

No 18 pakai cara yaa

Jawaban Terkonfirmasi

Mpq = $frac{y2 - y1}{x2-x1}$ = $frac{-1-5}{-2-1}$
   = $frac{-6}{-3} = 2$
Mqr = $frac{y3-y2}{x3-x2}$ = 2
       = $frac{a- (-1)}{3- (-2)} = 2$
   = $frac{a +1}{5} = 2$
   = a + 1 = 2 × 5
   = a + 1 = 10
   = a = 10 – 1
   = a = 9
jadi jwban.a adl (kl' g slh d.9)