**Answer:**

**Options (1), (2), (3)**

**Step-by-step explanation:**

Let the equation of the line is,

y = mx + b

Here m = slope of the line

b = y-intercept

Given line on the graph is passing through two points (-3, 0) and (0, 1).

Slope of this line will be,

m =

=

=

y-intercept of the line 'b' = 1

Equation of the line will be,

y =

If the points given in the options satisfy the equation, they will be the solution of the li**ne.**

Option (1),

For (3, 2),

2 =

2 = 2

True.

**(3, 2) is the solution.**

**Option (2)**

For (21, 8),

8 =

8 = 8

True.

**(21, 8) is the solution.**

**Option(3)**

For (-15, -4),

-4 =

-4 = -4

True.

**(-15, -4) is the solution.**

**Option (4)**

For (12, 9)

9 =

9 = 5

False

**(12, 9) is not the solution.**

**Option (5)**

For (-6, 1)

1 =

1 = -1

**False**

**(-6, 1) is not the solution.**

Therefore, **Options (1), (2), (3) are the solutions.**