A sprinter begins a race from a standstill, accelerating rapidly. Which option best describes the graph of the distance she has run versus time during this initial acceleration?

A straight line with a positive slope

An upward curve that gets steeper

An upward curve that gets flatter

A hot soup is left on a table to cool. Its temperature decreases quickly at first, and then more slowly as it approaches room temperature. What does the temperature vs. time graph look like?

A downward curve that gets flatter

A downward curve that gets steeper

A straight line with a negative slope

An upward curve that gets flatter

A straight line with a positive slope

An upward curve that gets steeper

An upward curve that gets flatter

A downward curve that gets flatter