Question

What is the equation of a line with a slope of ​1/2 and a point (3, 1) on the line?

Answer 1

$y(x)=( \frac{1}{2} )x+b \\ y(3)=( \frac{1}{2})3+b \\ 1= \frac{3}{2}+b \\ b=- \frac{1}{2} \\ \\ \boxed {y(x)=( \frac{1}{2} )x- \frac{1}{2} }$