Q. Find the y-coordinate of the y-intercept of the polynomial function defined below.f(x)=5x3−7x−1−6x2Answer:
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 the x-coordinate of any point on the y-axis is y0.
Substitute x=0: Substitute x=0 into the polynomial function f(x)=5x3−7x−1−6x2 to find the y-coordinate of the y-intercept.f(0)=5(0)3−7(0)−1−6(0)2
Simplify the expression: Simplify the expression by performing the calculations.f(0)=5(0)−7(0)−1−6(0)f(0)=0−0−1−0f(0)=−1
Find y-coordinate: The y-coordinate of the y-intercept is the value of f(0), which we have found to be −1.
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