<u><em>Answer:</em></u>
B. 0.08
<u><em>Explanation:</em></u>
<u>The general form of a linear equation is:</u>
y = mx + c
<u>where:</u>
m is the slope or the rate of change (increase or decrease)
c is the y-intercept or the initial value
Therefore, in a linear equation, the slope simply gives us the rate of change of the function (increase/decrease)
<u>Now, the given equation is:</u>
y = 0.08x + 5
<u>Comparing the given equation with the general form, we will find that:</u>
m = 0.08
Therefore, the cost of water increase for every gallon (rate of change) is 0.08
Hope this helps :)