Answer:
9=y
Step-by-step explanation:
The y-intercept is the point at which the graph of the equation crosses the y-axis. This is the point at which x=0 so you can calculate the y-intercept by plugging into the given equation.
[tex]x^2-6x+9=y\\0^2-6(0)+9=y\\0-0+9=y\\9=y[/tex]
Hope this helps!!