The equation would be:

V represents video game
M represents movies
Derrick plans to spend some or all which means he can use less than that amount or the whole amount
Hope this helps.
Should be 11.25 because 15 is 1/4 of 60 . U take 1/4 away from 60 so u gotta take 1/4 away from 15 which is 3.75 . And you get 11.25
The slope-intercept form:

m - slope
b - y-intercept
We have the slope 
and point (9, 7). Substitute:

<em>subtract 3 from both sides</em>

Answer: 
<span>−2,988 is the answer!</span>