I just want to give away points again

The speed of a falling object increases at a constant rate as time increases since the object was dropped. which graph could represent the relationship betweent time in seconds, and s, speed in meters per second? speed of a falling object object over time

Can someone me do math because i am having a breakdown rn because i don’t get it

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup