How do u find a midpoint

Kira looked through online census information to determine the overage number of people living in the homes in her city what is true about kira's data collection?

Identify the function that contains the data in the following table: x     -2         0         2         3         5     f(x)     5         3         1         2         4     possible answers: f(x) = |x| + 1 f(x) = |x - 2| f(x) = |x - 2| - 1 f(x) = |x - 2| + 1

Write the slope intercept equation for line ab.