Could someone help me and break it down to explain it please, thx

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

Which of the following is the correct ratio for converting kilograms to grams

Evaluate the expression for the given value of the variable 7a - 4a for a =8