The rate of change is
and the initial value is 0.
To find the rate of change (slope) of the linear function from the graph, you can use the formula:
From the graph, you need to select two points that the line passes through. Let's say we select the points (2, 1) and (7, 4).
Using these two points:
So, the rate of change (slope) is
The initial value (y-intercept) is the value of y when x=0. Looking at the graph, the y-intercept appears to be at (0, 0).