Which of the following is a dilation?
O (x, y)(x, 3y)
O (x, y)--(3x, 3y)
O (x, y)--(x, y-3)
O (x, y)---(.5x, .4y)
O Both 2 & 4

It’s the second option, (x,y) —> (3x,3y) since you have to multiply each coordinate by a certain number called the scale factor (in this case, it’s 3)

The first option won’t work because the scale factor has to be same for both coordinates. The third option is a translation, and the fourth won’t work either because you have to multiply each coordinate by the same variable.

You can find the area of a rectangle by multiplying the length and height. so multiply 1/2*7/4(which is the simpler version of 1 3/4) and you get 7/8 as your answer.