I wasnt there when my teacher taught properties of logs and i need help on those 3 questions

For which rational expression is -2 an excluded value of x?

Write an equation for the function that includes the points (1,4/5) and (2,2/3)

Candy lives in the center of town. her friend darlene lives 28 miles to the east and her friend dana lives 21 miles north. approximately how far do dana and darline live apart ?