6. All of the points in the picture are on the same line.
a.
(2, 2)
b.
C.
(6, 10)
(a, 8)
(4, b)
6-10
Find the slope of the line. Explain or show your reasoning.

Write an equation for the line.

Find the values for a and b. Explain or show your reasoning.
d. What is the y-coordinate when x = 0? Explain or show your reasoning.