class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"

A
B
y=f(x)
0
50
100
150
200
250
0 50 100 150

A
B
y=f(x)
0
50
100
150
200
250
0 50 100 150
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"
class="bi x0 y0 w0 h1"