Question

Write the equation of the line with a slope of ½ and a y-intercept of 3.

Answer 1

notice is says "write" not "find" i.e. just write it
general form is
\[y=mx+b\]
in your case \(m=\frac{1}{2}\) and \(b=3\)

Answer 2

clear right?

Answer 3

yeah