No student devices needed. Know more
15 questions
Y varies directly as x. If y = 12 when x = 15, what is y when x = 20?
4/5
17
16
25
n varies directly with c. If c = 24 when n = 18, what is c when n = 22?
88/3
28
66/4
24
Which equation exhibits a direct proportion?
y = 5x - 2
y = 3/4 x
y - x = 4
x = 6
Upon seeing, "y varies directly as x" we immediately.....
write down what x and y are
write down what k is equal to
substitute into the equation
write y = kx
Y varies directly as x. If y = 39 when x = 52, what is the best answer for k?
k = 52
k = 4/3
k = 3/4
k = 39/52
If x = 9 when y = 30, and x = 27 when y = 90, does y vary directly with x? If so, what is k equal to
Yes, k = 10/3
no
Yes, k = 3/1
Yes, k = 9
10
2.5
2
20
42
7
3
38
256
4
64
128
35
5
45
49
20
4
5
24
147
3
63
441
125
5
25
100
40
4
400
80
48
3
144
100
Explore all questions with a free account