Q. What is the focus of the parabola y=9x2?Simplify any fractions.(______,______)
Identify orientation: Identify the orientation of the parabola.Since the equation is y=9x2, it's a vertical parabola.
Write in vertex form: Write the equation in vertex form to find a, h, and k. The equation y=9x2 is already in the form y=a(x−h)2+k, where a=9, h=0, and k=0.
Calculate p value: Calculate the value of p using the formula p=4a1.p=4×91p=361
Find focus: Find the focus of the parabola using the values of h, k, and p.Since the parabola is vertical, the focus is (h,k+p).Focus = (0,0+361)Focus = (0,361)
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