Basic techniques

An equation, such as y = 10x2, expresses a relationship between two variables x and y. When x = 1 then y = 10.12 = 10. When x = 2 then y = 10.22 = 40. When x = 3 then y = 90 and so on. In fact, when x is given a value, the corresponding value of y can be found by squaring that value and multiplying ... View More