This fast math trick for instant calculation will have you correctly answerin. Y 2x 1 is a linear equation. 1 per month helps.
We divide both sides by 19.
When x increases y increases twice as fast so we need 2x. Solve the linear equation. We offer a wide range of study aids including mock exam papers revision cards all created by our expert team delivered direct to you. 1 If a question which have multiple answers simply tick all correct answers.