Question

equation for slope that passes through (0,4) and (1,8)

Answer 1

$m = \frac{y_{2} - y_{1}}{x_{2} - x_{1}} = \frac{8 - 4}{1 - 0} = \frac{4}{1} = 4$

y - y₁ = m(x - x₁)
 y - 4 = 4(x - 0)
 y - 4 = 4(x) - 4(0) 
 y - 4 = 4x - 0
   + 4        + 4
      y = 4x + 4