Does 4x+5y=0 represent a direct variation ?

The tangent of an angle is not which of the following? a) ratiob) proportionc) fractiond) opposite over adjacent

With this question! what is process of elimination? ? p.s. my brothers acc got banned so add his new one @ yamauchiyamyam17

5.(04.07) two different plants grow each year at different rates, which are represented by the functions f(x) = 4* and g(x) = 5x + 2. what is the first year the f(x) height is greater than the g(x) height? year 3 year 0 year 2 year 1