Answer:
[tex]y=7[/tex]
Step-by-step explanation:
The slope of the line with the equation [tex]y=3[/tex] is [tex]m=0.[/tex]
Parallel lines have the same slopes, so the slope of neededline is [tex]m=0[/tex] too.
The equation of the needed line will be
[tex]y=mx+b\\ \\y=0\cdot x+b\\ \\y=b[/tex]
This line passes through the point [tex](-2,7),[/tex] so its coordinates satisfy the equation:
[tex]7=b[/tex]
and the equation of needed line is
[tex]y=7[/tex]
