Answer:
scale factor = [tex]\frac{1}{4}[/tex]
Step-by-step explanation:
EF= 12 units
E' (- 1, 1 ) , F' (2, 1 )
Since y- coordinates are equal then E'F' is a horizontal line and
E'F' = | 2 - (- 1) | = | 2 + 1 | = | 3 | = 3
scale factor = [tex]\frac{E'F'}{EF}[/tex] = [tex]\frac{3}{12}[/tex] = [tex]\frac{1}{4}[/tex]
