Question

what is the main purpose of a line graph? to compare two things to show trends over time so you dont have to read words to have an independent variable

Explanation:

Line graphs use connected data points over a continuous axis, typically time, to visualize how a value changes, making trend identification their core function. Other options are incorrect: comparing two things is more common for bar graphs; avoiding text is not a formal purpose; and independent variables are a component, not the purpose.

Answer:

1. to show trends over time