If (y-k) denotes moving up vertically, what does (y+k) represent?

When considering the transformations of the function represented by ( y - k ), it is important to understand the effects on the graph of the equation. The expression ( y - k ) indicates a vertical shift upwards by ( k ) units. This means that for any given value of ( y ), subtracting ( k ) causes the entire graph to move up.

Conversely, the expression ( y + k ) represents another type of vertical transformation. In this context, when we evaluate ( y + k ), it implies that we are adding ( k ) to the value of ( y ). This addition results in a vertical shift downward by ( k ) units from the original position because you need a larger ( y ) value to reach the same point when we are interpreting the transformation in terms of the graph.

In summary, while ( y - k ) results in an upward movement, ( y + k ) causes the graph to move downwards, confirming that the correct association with ( y + k ) is indeed a downward movement vertically. This is critical in understanding how transformations affect Graphs in algebra.