Algebra is a branch of mathematics dealing with symbols and the rules for manipulating those symbols. In elementary algebra, those symbols (today written as Latin and Greek letters) represent quantities without fixed values, known as variables.
Gradient (m) = change in y/change in x -2-5/0–2 = 3.5 gradient (m) = 3.5 Now evaluate one of the coordinates and the gradient in the equation y = mx + c -2 = 3.5(0) + c c = -2 so the answer is y = 3.5x -2
