Answer:
Therefore, the slope-intercept form of the blue line is

Comparison:
The blue and black lines both have equal y-intercept but different slopes.
The black line is steeper than blue line which means the black line has a greater slope than the blue line.
Explanation:
Please refer to the attached graph of this question where we have two straight lines.
The slope-intercept form is given by

Where m is the slope of the line and b is the y-intercept.
Let us find the slope of the blue line from the points given in the graph.

The slope is given by

The y-intercept is given by

Therefore, the slope-intercept form of the blue line is

Comparison:
The blue and black lines both have equal y-intercept but different slopes.
The black line is steeper than blue line which means the black line has a greater slope than the blue line.