Answer:

Explanation:
The slope-intercept form of an equation of a line:

m - slope
b - y-intercept (0, b)
The formula of a slope:

From the graph we have two points (0, 4) → b = 4, and (3, 5).
Calculate the slope:

If you want the equation of a line, then put the value of m and b to the equation of a line:
