Which equation can be used to solve for b?

Jorge wants to determine the enlarged dimensions of a digital photo to be used as wallpaper on his computer screen. the original photo was 800 pixels wide by 600 pixels high. the new photo will be 1,260 pixels wide. what will the new height be?

The function f(x) is shown in this graph the function g(x)=6x

Urgent? will give brainliest to the first correct answer what is the area of the figure?