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Jobisdone [24]
2 years ago
7

Help please! Could you explain it too?

Mathematics
1 answer:
Anettt [7]2 years ago
3 0

Answer:

a) not proportional

b) proportional; k = -\frac{3}{5}

Step-by-step explanation:

a) for any proportional equation, the line must pass through the origin. The equation in a) is y = 4x + 1, and the '+1' is the y-intercept. This means that the line does not pass through the origin, so x and y cannot increase by the same amount (i.e. they are not proportional).

Another way to determine this is is to use the y = kx base. If you have an equation that fits that it's likely proportional.

Here, if the equation was only y = 4x then it'd be proportional because u can see that k = 4. This is not the equation though, and the 4x + 1 doesn't fit to the y = kx formula so it can't be proportional.

b) straight away you can see that there's no 'c' term (y = mx + c) which means the y-intercept is 0, so the line passes through the origin. While this does not immediately mean the line is proportional, you can make sure that it is by checking it fits with the y = kx equation.

y = -(3/5)x fits with y = kx, with k being -3/5

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Answer:

The answer is A. You just have to plug in.

Step-by-step explanation:

5x - y/3= 13

(2,-9) and (3,-6)

5(2) - -9/3 = 13

10 + 3 = 13

13 = 13 (true)

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8 0
3 years ago
For the function f(x) = x + 4, what is the ordered pair for the point on the graph when x = 3p?
sweet-ann [11.9K]
F ( x ) = x + 4
x = 3 p
f ( 3 p ) = 3 p + 4
Answer. D ) 
The ordered pair is:
( x, y ) =  ( 3 p, 3 p + 4 )
Thank you.
6 0
3 years ago
What numbers are the arrows pointing to ???
Allushta [10]

Answer:

Step-by-step explanation:

36

6.4

9.3

6 0
3 years ago
Read 2 more answers
1. If there is a decrease of 31 percent, what decimal do we multiply by to get the amount after the decrease?
sdas [7]

answer

1.

Short answer: 0.69Take 100. 31% = 31, 100-31=69Of course, when you increase the result by 31 percent you do not get the 100 back. But that was not the question.But, for completeness what do I multiply by to get the number, when adding 31 percent, gives me the original number, it is 0.7633 (1/1.31)

2.

Your measure start at 16. So that is the basis (unless stated otherwise) upon which you reference the change.

That is:

16

20−16

is you fraction.

This gives:

16

4

→

16÷4

4÷4

=

4

1

For this to be a percentage we need the denominator such that it becomes 100. Thus we have:

4

1

→(

4

1

×1)→(

4

1

×

25

25

)=

100

25

To express this in the standard script form we have 25%

お役に立てば幸いです

3 0
2 years ago
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Savatey [412]

Max will have to make a monthly payment of $9

8 0
3 years ago
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