Select all of the following that are a direct variation. (select all that apply) a. songs are 99 cents each to download. b. tickets for rides at the fair are $1 each. c. arcade games are 50 cents or $1. d. to go tubing it is $5 to rent the tube and $7 for each hour.

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step-by-step explanation:

agngel

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)