Answer:
The slope of the line would be
![\$0.89\ per\ avocado](https://img.qammunity.org/2021/formulas/mathematics/middle-school/y0lljpohmuvcl6yuawtdbeuzb88wooiyl8.png)
Explanation:
we know that
A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form
or
![y=kx](https://img.qammunity.org/2021/formulas/mathematics/middle-school/15ggalazf8cpjag5fv34y8ftpnv14l6oxo.png)
In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin
Let
x ----> the number of avocados
y ---> is the cost
In this problem we have a proportional relationship between the variables, x, and y,
The constant of proportionality k is equal to
![k=\$0.89\ per\ avocado](https://img.qammunity.org/2021/formulas/mathematics/middle-school/2ftno37gcyuejdmv1a9d8s52rx1ceidzr0.png)
so
The linear equation is
![y=0.89x](https://img.qammunity.org/2021/formulas/mathematics/middle-school/k3mc54o0bowlrkp6vod6faa70cte8hnizr.png)
The slope of the line is equal to the constant of proportionality k or unit rate
therefore
The slope of the line would be
![\$0.89\ per\ avocado](https://img.qammunity.org/2021/formulas/mathematics/middle-school/y0lljpohmuvcl6yuawtdbeuzb88wooiyl8.png)