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dusya [7]
3 years ago
6

Which table represents a direct variation function?

Mathematics
2 answers:
Luda [366]3 years ago
5 0
Direct variation is y=kx where k is a constant

the fiest way to see if it is direct or not, is if x increases, then y increases as well,
then we see if y=kx is valid, basically if we have a constant of variation


the first one x increase and y increase
see if same constant
y=kx
-4.5=-3k
1.5=k
so

see next one
-1 and 3
-3=-1(k)
-3=-1(1.5)
-3=-1.5
false
not it




2nd is increase and y decrease, so not direct variation

3rd is x is same but y increase so nope

4th is x increase and y increase, now test the constant
-7.5=-3k
2.5=k

-1 and -2.5
-2.5=-1k
-2.5=-1(2.5)
-2.5=-2.5
true

answer is last option
Liula [17]3 years ago
3 0

Answer:

D on ed

Step-by-step explanation:

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Samantha's age is 3 years more than half her uncle's age. If her uncle's age is z years, which of the following expressions best
melisa1 [442]

Answer:

See below

Step-by-step explanation:

z  = uncle's age

1/2z +3   = Sam's age

4 0
2 years ago
Sara has $1.30 less than double what Billy does. Sara has $53.72. How much money does Billy have?​
lilavasa [31]

Answer:

Billy has $27.51

Step-by-step explanation:

First let's set up an equation to solve this problem.

Assign a variable to Billy's amount. Let's make it x.

Then we just interpret the problem and solve:

2x - 1.30 = 53.72

     +1.30    +1.30

----------------------------

2x = 55.02

(Divide by 2 on both sides)

----------------------------

x = $27.51

2x = Billy's amount doubled

2x - 1.30 = Taking away 1.30 from double Billy's amount

53.72 = Sara's amount

6 0
3 years ago
Evaluate the expression 4 ÷ 2 + 52.
ch4aika [34]

Answer:

54

Step-by-step explanation:

4 ÷ 2 + 52

Order of operation

=  2 + 52

= 54

5 0
3 years ago
Read 2 more answers
a chicken can run at a top speed of 9 miles per hour find the top speed of a chicken in miles per minute round to the nearest te
eduard

so if you do 9 divided by 60 and it will give you 0.15 and that is your answer

5 0
3 years ago
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Does the point (-1,-4) lie on the line y = 5 - X?
Arisa [49]
No

X+y=5
It wouldn’t work
5 0
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