Answer: y = 0.5x+2
Explanation:
y = mx + c
where m is the gradient, and c is the value where the line cuts the y-axis.
In this case, the m would equal 0.5 because as the line moves 1 box across it moves up by 0.5.
The x would stay the same
The line intercepts the y-axis (vertical line) at 2
Making y = 0.5x+2