Ayuda por favor lo tengo que entregar al medio día

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

Lesson 9-3 for items 8-10, a square is drawn in the coordinate plane, with vertices as shown in the diagram. then the square is reflected across the x-axis. -2 4 8. the function that describes the reflection is (x, y) - a. (x, y-3). b. (x, y-6). c. (-x, y). d. (x,- y).

Sate why the measure of angle d is 120 degrees