Q. Find the y-coordinate of the y-intercept of the polynomial function defined below.f(x)=9x−4x2+9x3−3Answer:
Evaluate at x=0: To find the y-coordinate of the y-intercept of the function f(x), we need to evaluate f(x) at x=0, because the y-intercept occurs where the graph of the function crosses the y-axis, and this happens at x=0.
Substitute into f(x): Substitute x=0 into the polynomial function f(x)=9x−4x2+9x3−3.f(0)=9(0)−4(0)2+9(0)3−3
Simplify the expression: Simplify the expression by performing the operations. f(0)=0−0+0−3
Final result: The result of the simplification gives us the y-coordinate of the y-intercept. f(0)=−3