Answer:
The correct option is 4.
Step-by-step explanation:
The units rate is also knows as slope of the line.
If a line passing though two points then the slope of the lien is

From the given graph it is clear that the line passing through the points (0,0) and (10,7). The slope or unit rate of the given line is

The unit rate of the given line is 0.7.
If a equation is defined as
.... (1)
then m is the unit rate and b is y-intercept.
By comparing the given options and equation (1),we get
In option 1,

In option 2,

In option 3,

In option 4,

In option 5,

The unit rate of
is greater than the unit rate of given line, therefore the correct option is 4.