two different linear functions are shown below with two points given from each function. use slope-intercept form or point-slope form to find the equation of each.
linear function a
points: (–5,  –2), (–5, 7)
linear function b
points: (7,  –5), (–2,  –5)

function a has  a slope of 

the equation of line a

function b has  a slope of 

the equation of line b is