Could use a little help

Distance form points isn't my strong point ;-;

Bruce is getting materials for a chemistry experiment his teacher gives him a container that has 0.25 liter of liquid in it.bruce need to use 0.4 of this liquid for the experiment. how much liquid will bruce use?

Why do interests rates on loans to be lower in a weak economy than in a strong one

What is the slope of the line shown below?