Me with thus quiz

#1 which equation represents a direct linear variation?

y=25x

y = x2
y=1x

y = x + 3

#2 which is the direct linear variation equation for the relationship?

y varies directly with x and y = 10 when x = 2.

y = x + 8

y=x−8

y = 2x + 6

y = 5x

#3 if f(x) varies directly with x and f(x) = 50 when x = –10, then what is f(x) when x = 15?

–150

–75

–30

–5

#4 the number of miles abigail’s boat travels, m, varies directly with the amount of time abigail spends boating, t. if she spends 2 h in her boat, she travels 19 mi.

which direct linear variation equation models the information?

m = 4.5t

m = 21t

m = 17t

m = 9.5t

#5 the total distance a balloon rises into the sky varies directly with the amount of time it is in the air. manny released his balloon, and after 5 s it had risen 40.5 yd.

how far will the balloon have risen after 10 s?

enter the answer in the box.
yd.

#6 the cost of buying apples varies directly with the number of apples purchased.

if 8 lb of apples cost $17.20, how many pounds of apples can be purchases for $43?

enter the answer in the box.
lbs.

#7 what is the constant of variation for the quadratic variation?

7y = 0.28x2

0.04

0.28

0.98

7

#8 which is the quadratic variation equation for the relationship?

y varies directly with x2 and y = 36 when x = 3.

y = 12x2

y=112x2

y=14x2

y = 4x2

#9 what is the constant of variation for the inverse variation?

xy=13

16

13

3

6

#10 write the inverse variation equation for the relationship:

y varies inversely with x and y = 4 when x = 2.

y=12x

y = x + 2

y = 2x

y=8x