雲朵形圖說: How many 
solutions will 
there
be for this 
equation?
How many
solutions will
there
be for this
equation?
All of these
ordered-pairs are
the solutions
or the roots
of the equation.
Linear Equation in Two Unknowns
There are
infinitely many
solutions
for a linear
equation in
TWO unknowns.
(二元一次方程式)
When x = - 2,
x = -2
y = -6
When x = 0,
x = 0
y = -3
x = 1
y = -1.5
x = 4
y = 3
x = 10
y = 12
When x = 1,
When x = 4,
When x = 10,