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You move the graph upwards by 2 units.
y=x+1 there for answer is 2
x = 1 is a graph of a straight line that touches the x-axis at 1 and extends infinitely up and down.
graph gx is the reflection of graph fx and then transformed 1 unit down
y = x^2 - x - 2 This is the graph of a parabola. We need to find the x-intercepts. Set 0 for y, and solve for x: 0 = x^2 - x - 2 0 = (x + 1)(x - 2) x + 1 = 0 or x - 2 = 0 x = -1 or x = 2 Thus, x-intercepts are -1 and 2. The graph of y = x^2 - x - 2 crosses the x-axis at x = -1 and x = 2.