Big Ideas Math - Algebra 1, A Common Core Curriculum

Published by Big Ideas Learning LLC
ISBN 10: 978-1-60840-838-2
ISBN 13: 978-1-60840-838-2

Chapter 8 - Graphing Quadratic Functions - 8.3 - Graphing f(x) = ax^2 + bx + c - Exercises - Page 436: 24

Answer

The function has a minimum value. The minimum value is $\frac{1}{2}$.

Work Step by Step

Comparing $y=2x^{2}-10x+13$ with $ax^{2}+bx+c$, we see that $a=2$ and $b=-10$. As $a\gt0$, the parabola opens up and the function has a minimum value. The minimum value is the y-coordinate of the vertex. The x-coordinate of the vertex is given by $x=-\frac{b}{2a}=-\frac{-10}{2(2)}=\frac{5}{2}$ Evaluating the function at $x=\frac{5}{2}$, we get the y-coordinate of the vertex as $y=2(\frac{5}{2})^{2}-10(\frac{5}{2})+13=\frac{1}{2}$
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