Are multiples of 3 also multiples of 6

No, some of them are, but not all of them

Step-by-step explanation:

I hope this helped you out!

Step-by-step explanation:

No; all multiples are not multiples of 6, for example 3×3 = 9 is not a multiple of 6.

However as 6 = 2×3 all multiples of 6 are also multiples of 3.

Multiples of 3:

3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60.

The multiples of 6

6, 12, 18, 24, 30, 36, 42, 48, 54, 60, 66, 72, 78, 84, 90, 96, 102, 108, 114, 120, 126, 132, 138, 1

a) false; the points do not have to be in a straight line.

step-by-step explanation:

the points could be in the shape of a triangle

b is incorrect

c is incorrect because it is saying the immediately don't form one when they are capable of doing so

d is incorrect