No one bothered to me so someone plz i beg

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: the equation of line a is: function b has: the equation of line b is:

What is the average rate of change for this function for the interval from x=2 to x=4 ?

Don't know how to find x given these segment lengths