Working out equations of a line and calculating gradient
Substitute the gradient of 3 in place of ๐ in the equation ๐ฆ = ๐๐ฅ + ๐ to give ๐ฆ = 3๐ฅ + ๐. Substitute the values of ๐ฅ and ๐ฆ from the coordinates of the point (2 ...