Q. Find the y-intercept of the parabola y=x2+21. Simplify your answer and write it as a proper fraction, improper fraction, or integer._____
Determine y-intercept: To find the y-intercept of the parabola, we need to determine the value of y when x=0.
Substitute x=0: Substitute x=0 into the equation y=x2+21.y=(0)2+21y=0+21y=21
Identify y-intercept point: The y-intercept of the parabola is the point where the graph of the parabola crosses the y-axis. Since we have found the value of y when x=0, this value represents the y-intercept.
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