Question

A rectangle with vertices located at (1, 2), (1, 5), (3, 5), and (3, 2) is stretched horizontally by a factor of 3 with respect to the y-axis. What is the area of the image that is produced?

Answer 1

Orignal rectangle has an area of : 3 * 2 = 6

Now the y is stretched 3 times, so the area will increase 3 times too, which is 18