4. If he needed to decrease the acidity of the solution, which of the following is correct ew acidity of the solution given x mL of water added? 36 300++ 0.36 function that would show the new a. f(x) = b. f(x) c. f(x) = d. f(x) = 300+ 12 300+x 0.12 300+x 5. If Joel decided to decrease the acidity of the solution by adding 15 more than at every interval, which table of values is correct? 1 2 10.91% 3 10.43% 10% X 11.43% a. f(x) in % 4 1 3 0.1043% 2 0.1091% x 0.10% b. 0.1143% f(x) in % 1 3.81% 2 3.64% 3 3.48% X 4 3.33% C. f(x) in % 1 3.81% 3 3.48% 2 3.64% 4 3.33% х f(x) in % d. 6. Which graph shows the decrease of acidity in Joel's solution? C. a. b. d.​