Given the graph of a line:
The rate of change for the function is equal to its slope m
Choose two points to find the rate of change:
Let ( x1, y1 ) = ( 0, 2 )
Let ( x2, y2 ) = ( 2, 5 )
![m=(y_2-y_1)/(x_2-x_1)=(5-2)/(2-0)=(3)/(2)](https://img.qammunity.org/2023/formulas/mathematics/college/p4z6wkx29udrskcl5rptcnhtg37rxmfacx.png)
The y-intercept of the line is the point ( 0, 2 ), that is is the initial value
So, b = 2
you already know that m = 3/2
Substitute those values into the slope-intercept form: y = m * x + b
![y=(3)/(2)x+2](https://img.qammunity.org/2023/formulas/mathematics/college/u3ptlyd33zuap11z4edqkcf7u9ga37vzhz.png)
The rate of change for the linear function is 3/2 and its equation is
y = 3/2 x + 2