Answer:
The graph of an equation can be identified by looking at the characteristics of the equation, such as the order.
Quadratics
The equation given is quadratic because the highest exponent is 2; this means the equation has an order of 2. All equations with an order of 2 are quadratic equations. Quadratic equations form parabolas, which look like a U. Additionally, the leading coefficient is positive. This means that the parabola will open upwards, with the vertex being the minimum of the graph.
Other Characteristics
We can find more information from the equation to help us find the graph. Specifically, we can find the y-intercept. To find the y-intercept, simply plug 0 in for x and solve.
- g(0) = 3(0)² - 24(0) + 45
- g(0) = 45
This means that the y-intercept is 45.
Additionally, to find the x-coordinate of the vertex, we can use the equation -b/(2a).
=
= 4
The x-value of the vertex is 4. With all of this information, we can identify what the graph will look like. However, if you need to find the full graph, you can plug x-values into the equation, solve for y, and then plot the coordinate pairs. Below is a picture of the graph.