Answer:
1) When creating a graph, it is important to use a pencil as it allows for easy correction and modification. The three basic graphing rules are correctly labeling the x and y axes, choosing a suitable scale, and plotting the data points accurately. The x-axis represents the independent variable, while the y-axis represents the dependent variable. The numbers 0, 5, 7, 10, 15, and 20 are inappropriate for a scale because they are not equally spaced. When creating a scale for a graph, a student should avoid using a non-linear scale. If students plotted their data points, they should connect them with a line and label the graph accordingly. This will allow for better interpretation and understanding of the data presented.
2)The scientific method is a systematic approach to solving problems. The four main steps of the scientific method are observation, hypothesis, experimentation, and conclusion. A hypothesis statement is an educated guess or prediction about the outcome of an experiment. The words that should always be used or implied in a hypothesis statement are "if" and "then." The experimental group is the group that receives the experimental treatment, while the control group is the group that does not receive the treatment. In any experiment, only one variable should be tested/changed at a time to ensure accurate and reliable results. The experiment is a good use of time, even if the hypothesis is proven wrong, because it can provide valuable information on what does not work. The independent variable is the variable that is being manipulated, while the dependent variable is the variable that is being measured. To improve any experiment, one can increase the sample size control variables and repeat the experiment multiple times to ensure accuracy and reproducibility.