The table below shows the height of 7 fathers and the heights of their children. 155 168 172 180 185 Father's Height (cm) Child's Height 151 (cm) a) Identify the variables. [2] 158 151 163 153 147 154 b) Describe the relationship between the two variables. [1] 168 175 I use algebra to determine an equation for the line of best fit (y=mx+b) dy use the equation to predict the height of a child if their father's height is 170mm