To find this you can use slope-intercept form which is y=mx+b where m=slope and b=y-intercept. You just have to plug both numbers in, giving you [tex]y=\frac{1}{2} x+2[/tex].
The equation of a line is y=mx+c Where m is the gradient and c is the y intercept If you substitute m with 0.5 and c with 2 the answer will be y=0.5x+2
