I don’t get it this ain’t make no sense

What is the value with a place of tenths in 907.456 1) 0 2) 6 3) 4 4) 5

Finding tbe values of the variables in each kite

Erinn wrote the equation –5x + 4y = 32 to represent her hourly wage (y) and how this wage has changed during each year that she worked at a company (x). what is the rate of change in erinn's hourly wage per year?