Someone tell me the answer to these 3 pls

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

Find an equation for the linear function which has slope -10 and x-intercept -7

The sum of the reciprocal of a positive number and the reciprocal of 2 more than the number is 3/4 equation: the number is