This table shows input and output values for a linear function f(x).

What is the difference of outputs for any two inputs that are three values apart?

Express your answer as a decimal.



x ​f(x)​
​−3​ ​−10.25​
​​ ​−2​ −9.5
​−1​ −8.75
0 −8
1 −7.25
2 −6.5
3 −5.75


pleaseeeeeeee help