Answer:
y = 3x + 9
Step-by-step explanation:
the equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
y = 3x + 4 ← is in slope- intercept form
with slope m = 3
• Parallel lines have equal slopes , then
y = 3x + c ← is the partial equation of the parallel line
to find c substitute (1, 12 ) into the partial equation
12 = 3 + c ⇒ c = 12 - 3 = 9
y = 3x + 9 ← equation of parallel line