Just as ice melts to water, graphs undergo phase transitions. Two mathematicians showed that they can pinpoint such transitions by examining only local structure. The Quanta Newsletter ...

The graphs above, \(y = 2x + 1\) and \(y = 2x - 2\) have the same gradient of 2. The lines are parallel. State the equation of a line that is parallel to \(y = 3x + 7\). To be parallel, two lines ...

A line graph is used to spot trends in data over time ... Practise comparing and interpreting line graphs with this quiz. You may need paper and a pen to help you. Investors use line graphs ...