Any straight line graph has a constant gradient, which is calculated by the change in 𝑦 divided by the change in 𝑥, along any section of the graph. The gradient is measuring the steepness of the ...
When you see a flat line on a graph, it’s tempting to think, “Oh hey, at least the situation isn’t getting any worse!” But one of the common types of charts we see for COVID-19 is of new cases per day ...
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