Select all that apply. Which graphed lines represent direct variation functions?
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х
2 3 4 $
b
2
a
ch
line a
line b
line c
line d

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

The width of a rectangle is half as long as the length. the rectangle has an area of 18 square feet. what are the length and width of the rectangle?