AntonyTheGreatest:
What is the y-intercept of the quadratic function f(x) = (x – 6)(x – 2)? (0,–6) (0,12) (–8,0) (2,0)
helpandlearnandchat:
Do you know how to expand \((x-6)(x-2)\) to standard form?
AntonyTheGreatest:
nope
SnipingSoup:
Ok Just plug in 0 for x so (0-6)(0-2) = what
AZ:
The y-intercept is when x = 0 So as SnipingSoup suggested, replace x with 0 and solve for f(x). That will tell you the y-intercept. Remember when you're looking at your answer choices that points are written in the form of (x, y) The x-value goes first and we know that's 0 since at the y-intercept x equals 0. That alone should help you eliminate two answer choices.
AZ:
Also for any future questions, if you're trying to solve for the x-intercept you would do the opposite The x-intercept is when y = 0 or when the line crosses the x-axis
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