IF A=[2,4] and B=[0,3] then BUA=?​

Ashopper bought a watermelon a pack of napkins and some paper plates in his state there was no tax on food the tax rate on non-food items is 5% the total for the three items he bought was 825 before tags and he paid $0.19 in taxes how much did the watermelon cost

In the diagram of circle a what is m

What is the y-intercept of the line given by the equation