Please solve with explanation I’ve been asking for awhile

Aline passes through (1,-5) and(-3,7) write an equation for the line in point slope form rewrite the equation in slope intercept form

Ahighway between points a and b has been closed for repairs. an alternative route between there two locations is to travel between a and c and then from c to b what is the value of y and what is the total distance from a to c to b?

Use pascal's triangle to find the missing values. x4 - 4xb + 6x2 - ax + 1