Final answer:
The constant value cannot be determined without the graph. Normally, the constant in a quadratic equation of the form ax^2 + bx + c = 0 is represented by 'c' and can be found from the graph's y-intercept or via the quadratic formula if 'a', 'b', and 'c' are known.
Step-by-step explanation:
The value of the constant in the given equation is not clearly represented as the graph supposedly associated with the question has not been provided. However, when we are dealing with the equation of a quadratic in the form ax2 + bx + c = 0, the values of a, b, and c are termed as coefficients or constants of the equation, depending on the context. Usually, if the graph of the quadratic were provided, it could possibly illustrate key features such as the x-intercepts (solutions to the equation), vertex, axis of symmetry, or the y-intercept, which is where the value of c, the constant term, would be identified on the y-axis.
Without the graph, we can refer to various formulas and concepts relating to quadratics such as the quadratic formula, which requires the values of a, b, and c to calculate the solutions of a quadratic equation. As an example, given the constants a = 1.00, b = 10.0, and c = -200, the quadratic formula can be applied to find its solutions.