Mathematics

Problem

The vertices of a triangle are

A(1,2)

B(4,2)

and

C(1,6)

. The triangle is transformed by

(x,y)\mapsto(3x,\,y)

. Find the area of the image of the triangle. a)

12\text{ square units}

6\text{ square units}

18\text{ square units}

9\text{ square units}