PLEASE HELP ME WITH THUS QUIZ ASAP!!
#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
