how would I write an equation for the following linear relationships:

Question

(x5,y20),(x10,y30)(x15,y40)(x20,y50)(x25,y50)(x30,y50)

Answer 1

That is one linear relationship from x=5 to x=20. For x > 20; y = 50. That is a second linear relationship.

It is a piecewise continuous function
y = 2x + 10 (5 < x <or = 20)
y = 50 (20 < x < 30)

Answer 2

10. Which of the following is the equation of a line that passes through (-2, -1) and (-4, -3)?