What is an explicit rule for the sequence 9, 14, 19, 24

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?

Aline passes through the point (–7, 5) and has a slope of 1/2 which is another point that the line passes through?

Which number line correctly shows 0.8 + 0.3?