Question

I want this answer by step by step good ans will be marked as brainlist

Answer 1

Answer:

-4.

Step-by-step explanation:

Two vectors are collinear if the ratios of their respective components are equal, or, more correctly, if:

a = kb, where k is some real constant.

Here, $\frac{2}{a} = \frac{-3}{6} = \frac{4}{-8} = -\frac{1}{2}$, for the vectors to be collinear.

So, $2 *(- \frac{2}{1}) = a$

Hence, $a = -4$