If two quantities are proportional, which must be true of a graph showing the relationship between them? Select all that apply.
A The graph is a curve.
B The points on the graph are connected.
The graph increases from left to right.
D The points of the graph form a straight line.
E The points of the graph must include the origin
The points must all form equivalent ratios.

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )

to find the perimeter, you add up all the lengths of the sides. in this case you would have to add up 18+22+40+80 which equals 160.