Plz help no guessing

Triangle XYZ is a dilation of triangle ABC with a scale factor of 2. This means that the side lengths of Tri ABC were all multiplied by 2 to get Tri XYZ. So to find the length of Line XZ, we would just multiply the length of Line AC by 2.
3 * 2= 6
The answer to your question is C. 6 units
Set each sides of a triangle as a fraction, and set both triangles equal to each other.
Let side XZ's measurement = x
Set the sides as fractions equal to each other.
3/4 = x/8
Cross multiply
3/4(4)(8) = x/8(8)(4)
3(8) = x(4)
Simplify
24 = 4x
Isolate the x. Divide 4 from both sides
24/4 = 4x/4
x = 24/4
x = 6
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(C) 6 units is your answer
hope this helps