What are quantitative relationships?

Answer 1

I have my science ISA paper 2 and the first question is about quantitative relationships. It is an experiment and there are results. I know quantitative data means number data but what is quantitative relationship between variables (changes)

Answer 2

Quantitative relationships refer to the mathematical connections between different variables or quantities. They involve understanding how one variable changes in relation to another, often described through equations, formulas, or graphs. By analyzing these relationships, we can make predictions or draw conclusions about how changes in one variable may affect another.

Answer 3

By nature science is a quantitative discipline, that is a science law has always to be configured as a relation between measures of determined quantities. A good example of science law is the Ohm law:

V= R I

this law means that is two points in an electrical circuits are considered and the current and potential drop are measured between these two points, they are proportional (at least within the validity limits of the Ohm law) and the proportionality coefficient is the resistance between the two points.

Nevertheless, sometimes during experimentation it becomes clear that there is a relationship between certain quantities, but the nature of such a relationship is not clear.

For example, experimenting with electrical circuit I could observe that increasing the potential difference V the current I always increases, without being able to obtain a precise law starting from available data: this is a qualitative law. This can be a precious intermediate result, guiding on the way of finding a quantitative relation, nevertheless it is always an intermediate result.