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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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The volume of the cylinder below is 108π cm^3.
tresset_1 [31]

Answer:

i think it is d or c idk

Step-by-step explanation

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6 0
3 years ago
Based on a survey of U.S. residents completed in 2014, ___________ percent of respondents agreed that global warming is occurrin
Daniel [21]

Using the percentage concept, supposing 520 out of 1000 respondents believe in global warming, 52% of respondents agreed that global warming is occurring.

<h3>What is a percentage?</h3>

The percentage of an amount a over a total amount b is given by a multiplied by 100% and divided by b, that is:

P = \frac{a}{b} \times 100\%

In this problem, we suppose that 520 out of 1000 respondents believe in global warming, hence a = 520, b = 1000, and the percentage is of:

P = \frac{520}{1000} \times 100\% = 52\%

More can be learned about the percentage concept at brainly.com/question/10491646

3 0
2 years ago
Select all irrational numbers. √4 √8 √10 √15 √35
larisa [96]
√4 =2
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√15=√15 as (Decimal: 3.872983)
√35=√35 as (Decimal: 5.91608)
6 0
3 years ago
The price of a gallon of gasoline increased from 2.50 a gallon to 2.75 a gallon what was the percent increase
Vera_Pavlovna [14]
The increase in price was 10%
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2.5+.25=2.75
hope this helps
8 0
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Lubov Fominskaja [6]

Answer:

B

Step-by-step explanation:

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8 0
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