Is 0.75 degrees Celsius a negative temperature or positive temperature

positive

Step-by-step explanation:

if it was negative it would look like

-0.75

not

0.75

Positive

Step-by-step explanation:

Anything below 0 is negative. 0.75 > 0

for finding the midpoint of any given 2 pair of points simply add the respective x coordinates with other x coordinate and the y coordinate with other y coordinate and divide them by 2

in your question it will be :

(3+1)/2 for the x coordinate of mid point i.e 2

[8+(-4)]/2 for the y coordinate of midpoint i.e 2

so coordinates of mid point of points (3,8) and (1,-4) will be (2,2)

the answer

b. they are parallel and will never intersect.