equation of the line graphed in the xy plane

If a > 0 and b > 0, which of the following could be an equation of the line graphed in the xy-plane above?

• A.

  y = −ax − b

• B.

  y = ax − b

• C.

  y = ax + b

• D.

  y = −ax + b

• E.

  y = abx

Explain your answer.