Question

Help on a few questions?

1. Write the direct variation of the equation if y varies directly with x and y=45 when x=9.
a. 4=5x
b. y=1/5x
c. y=-5x
d. y=-1/5x

2. If y varies directly with x and y=-7 when x=-1, find x when y=-84.
a. 84
b. 7
c. -12

3. Write the slope-intercept form of the line which passes through (4,2) with a slope of 1/2
a. y=1/2x + 2
b. y=1/2x
c. y=1/2 x + 4

Thank you, in advance.