A parabola has a vertex located at (6,−5) and passes through the point (8,3). Use the pattern of the parabola to look for a vertical or horizontal stretch. Write the equation of the graph in vertex form.
Q. A parabola has a vertex located at (6,−5) and passes through the point (8,3). Use the pattern of the parabola to look for a vertical or horizontal stretch. Write the equation of the graph in vertex form.
Understand Vertex Form: First, we need to understand that the vertex form of a parabola is given by y=a(x−h)2+k, where (h,k) is the vertex of the parabola. We are given the vertex (6,−5), so we can substitute h and k into the equation.
Substitute Vertex: Substituting the vertex into the vertex form equation, we get y=a(x−6)2−5. Now, we need to find the value of a using the point (8,3) that lies on the parabola.
Find Value of 'a': Plugging the point (8,3) into the equation, we get 3=a(8−6)2−5. Simplifying the right side, we have 3=a(2)2−5, which simplifies to 3=4a−5.
Solve for 'a': To find the value of 'a', we solve the equation 3=4a−5 for 'a'. Adding 5 to both sides gives us 8=4a, and dividing both sides by 4 gives us a=2.
Write Final Equation: Now that we have the value of a, we can write the final equation of the parabola. Substituting a into the equation y=a(x−6)2−5, we get y=2(x−6)2−5.