Graph 4. Answers to question 2

From

Experimentation in Times of COVID 19. Didactic Sequence “Influence of pH on plant irrigation” for a High School Chemistry Course

Adolfo E. Obaya Valdivia, Carlos Montaño Osorio, Yolanda Marina Vargas Rodríguez, Rubén Gerardo Ponce Pérez

American Journal of Educational Research. 2021, 9(12), 746-754 doi:10.12691/education-9-12-7