Answer:

Step-by-step explanation:
Given
-- degree of freedom

Required
Determine the t-value
The given parameters can be illustrated as follows:

Where

So, we have:

To solve further, we make use of the attached the student's t distribution table.
From the attached table,
The t-value is given at the row with df = 28 and
is 3.673900
Hence, 
Answer:
9/4
Step-by-step explanation:
y2 - y1 / x2 - x1 = 6 - (-3) / 2 - (-2) = 9/4
Answer:
12/19
Step-by-step explanation:
19/19 - 7/19 = 12/19
True the whole statement is true