Which of the following is the graph of the quadratic function y=x^2 - 4x + 4?
2 answers:
Answer:
look at x=0 and plug in 0 for any x you find in the equation
f(0) = 0² - 4*0 +4 = 4
c is out of the race then
let's do this again, but test for x=1 and x=2
f(1) = 1² - 4*1 + 4 = 1
f(2) = 2² - 4*2 +4 = 0
a and b are out
its graph d
when testing like this, choose easy-to-calculate numbers to find out what points you get when asking for the y-value at an arbitrary x-place
Answer:
D
Step-by-step explanation:
convert into vertex form
x^2-4x+4 = (x-2)^2 +0
vertex: (2, 0)
Graph D has vertex (2, 0)
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