Determine if the function is one-to-one. a decreasing line intercepting the y axis at 0, 5.

Assuming they mean straight line, then this graph is one-to-one. It is impossible to draw a horizontal line that will cross through more than one point on the diagonal line already graphed. 

Contrast this with a parabola where it is possible to draw a horizontal line through more than one point on the parabola. So the parabola would not be one-to-one. 

Option a : week- amuont paid