Watch this video to learn about the equation of a straight line. Since we are given 2 points that already lie on the line, using the formula as before, we need to calculate the gradient first.

You put a lot of effort and time into creating the perfect email content for your subscribers. But no matter what you write, or how well, people may not even see your email if the subject line doesn't ...

But do you know how to insert a sum without typing the formula? Have you struggled to start a new line of text within a cell? Well, you need to learn these less popular but extremely useful shortcuts.