3) For the equation -4y=8x, what is the constant f variation? A. -4
B. -2
C. 1
D. 2
4) suppose y varies directly with x, and y=24 when x=8. What is the value of y when 2=10?
A. 10
B. 30
C. 80
D. 240
5) What is an equation for the line with slope 2/3 and y-intercept 9?
A. y=2/3x\
B. y=9x
C. y=2/3x+9
D. y=9x+2/3
6) What is an equation in slope-intercept form for the line that passes through the points (1,-3) and (3,1)?
A. y=3x+1
B. y=x-3
C. y=2x+5
D. y=2x-5