Answer:
Part 1) 
Part 2) The y-intercept is the point (0,-4)
Part 3) The solution of the system is (2,0) (the graph in the attached figure)
Step-by-step explanation:
Part 1) What is the slope of the linear function that passes through the points (–2, –8) and (1, –2)?
The formula to calculate the slope between two points is equal to

substitute the values



Part 2) What is the y-intercept?
Find the equation of the line in slope intercept form

we have


substitute and solve for b

so

The y-intercept is the point (0,-4)
Part 3) Graph the linear function to determine the solution. What is the solution?
we have
----> equation A
----> equation B
Solve the system by graphing
The solution is the intersection point both graphs
using a graphing tool
The solution of the system is (2,0)
see the attached figure