What’s the equation of the blue line?

Answer:
x + 2y = 4
Step-by-step explanation:
Line is passing through the points (4,0) and (0, 2)
Slope of line (m) = (2 - 0)/(0-4) = 2/(-4) = - 1/2
y - intercept (b) = 2
Equation of line in slope intercept form is given as:
y = mx + b
Plugging m = - 1/2 and b = 2 in the above equation, we find:
[tex]y = - \frac{1}{2} x + 2 \\ \\ 2y = - x + 4 \\ \\ x + 2y = 4[/tex]