The equation of the line in the graph is
Gradient of line = Change in yChange in x\frac{\text{Change in y}}{\text{Change in x}}Change in xChange in y = y2−Yx2−x\frac{y_2 - Y}{x_2 - x}x2−xy2−Y
y2_{2}2 = 01_{1}1
Y1_{1}1 = 4
x2_{2}2 = 3 and x1_{1}1 = 0
y2−y1x2−x1=0−43−0=−43\frac{y_2 - y_1}{x_2 - x_1} = \frac{0 - 4}{3 - 0} = \frac{-4}{3}x2−x1y2−y1=3−00−4=3−4
Equation of straight line y = mx + c
Where m = gradient and c = y
intercept = 4
y = -43\frac{4}{3}34x + 4 multiply through by 3
3y = -4x + 12
