Question

Find the x intercept, y intercept,Max/Min of functions.
1.f(x)=x(7-x)
2.f(x)=-x(7-x)
3.f(x)=(x-3)(x+5)
4.f(x)=-(x-3)(x+5)
5.f(x)=(x-3)(x-8)
6.f(x)=-(x-3)(x-8)
7.f(x)=2(x-3)(x-8)
8.f(x)=-2(x-3)(x-8)

Answer 1

x intercept is where the f(x) = 0, so for example
1. at x=0 and at x=7
Max and min can be found by taking derivative = 0 or by graphing.

Answer 2

Im confused.

Answer 3

x-intercept is value where the function =0 [y = 0]
y-intercept is value where x = 0

For #1 f(x) = y = x(7-x) so y = 0 when x = 0 or x =7
when x =0, y = 0, so this is the y-intercept.

Finding max and min more complicated. Do you understand so far?