The following is the graph of a quadratic friction, find the value of x when y = 0
A.
1, 2
B.
1, 4
C.
2, 3
D.
1, 6
Correct answer is B
when y = 0, value of x = roots of the equation
x2 - 5x + 4 = 0
x = 1, 4 (see graph)