McGraw Hill Integrated II, 2012
MH
McGraw Hill Integrated II, 2012 View details
1. Graphing Quadratic Functions
Continue to next subchapter

Exercise 3 Page 99

Make a table of values and connect the obtained points with a parabola.

Graph:

Domain: All real numbers
Range: y≥ -12

Practice makes perfect

We want to graph the given quadratic function. y=x^2-6x-3 To do so, we will make a table of values.

x x^2-6x-3 y=x^2-6x-3
0 0^2-6( 0)-3 -3
1 1^2-6( 1)-3 -8
3 3^2-6( 3)-3 -12
5 5^2-6( 5)-3 -8
6 6^2-6( 6)-3 -3

Let's now plot the obtained points on the coordinate plane and connect them with a parabola.

We see above that the x-variable can take any value. Conversely, the y-variable only takes values greater than or equal to -12. Using this information, we can write the domain and range of the function.

Domain:& all real numbers Range:& y≥ -12