Without an image of the coordinate plane the question is referencing, I cannot answer your question, but I can tell you what it means for both k and h to be positive: the line will hit the x-axis on the right side of the origin if k is positive, and the y axis above the origin if h is positive. There may be different possibilities for h and k if both are present in an equation though so you will have to find an answer using these rules:
1. If h is a positive number (disregarding the negative sign in (x - h)) then the line will be shifted however many digits h is to the right. For example, the linear equation f(x) = (x - (+5)) + k will be shifted 5 units to the right on top of the vertical shift done by k.
2. If k is a positive number then the function will be shifted upwards by however many units k is. For example, the equation l(x) = (x - h) + 4 has a vertical shift of +4.
