Observe the figure, first find the y-intercept value by replacing m with 3, y with 2 and x with 1 in the equation .
(Apply multiplicative identity property:
)
Apply subtraction property of equality: If a = b then a c = b
c.
(Subtract 3 from each side)
(Apply commutative property of addition:
)
(Apply additive inverse proeprty:
)
(Subtract:
)
Replace m with 3 and b with 1 in the equation
.
(Simplify)
The slope-intercept form line equation is .