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Contact [7]
3 years ago
9

A. a scientist is studying the change in population for two species of fish in a lake. The table shows how the numbers of each s

pecies changed during a 4-year period.
YEAR: 1; 2; 3; 4
FISH A: 500; 520; 540; 560; 580
FISH B: 400; 430; 460; 490; 520
The scientist uses a linear model to predict future populations of both fish. Explain why, given the data in the table, population of fish A and the population of fish B can be modeled using linear equations.
Mathematics
1 answer:
Rom4ik [11]3 years ago
5 0

Answer:

The data can be modeled using linear equatins, because there's the same amount of population for fish A (+20 per year) and fish B (+30 per year) every year.

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Can someone help me find the slope , y-intercept ,and equation pls help it’s my finals
Likurg_2 [28]

Answer:

slope: -3

y-intercept: -5

equation: y = -3x - 5

Step-by-step explanation:

The formula for slope is:

(y2 - y1)/(x2 - x1)

Let's use these coordinates:

(-1, -2)

(0, -5)

x1 = -1

x2 = 0

y1 = -2

y2 = -5

Substitute into the formula:

(y2 - y1)/(x2 - x1)

(-5 + 2)/(0 + 1)

Solve:

(-5 + 2)/(0 + 1)

-3/1

= -3

slope = -3

The y-intercept is when the x coordinate is 0.

Looking at the table, we see the coordinate (0, -5).

The y-coordinate is -5.

This means that the y-intercept is -5

y-intercept = -5

Slope-intercept form:

y = mx + b

where m is the slope and b is the y-intercept

m = -3

b = -5

Substitute:

y = mx + b

y = -3x - 5

6 0
3 years ago
If the ratio for unit cost to sales price for a product is 1:4, how much would the selling price be for a product if it has a un
Over [174]
Unit cost to sales price is 1:4.....or 1/4

1 / 4 = 33.85 / s.....1 unit cost to 4 sales price = 33.85 unit cost = s sales price
cross multiply
(1)(s) = (4)(33.85)
s = 135.40 <=== selling price
3 0
4 years ago
Read 2 more answers
What is the answer to -5m-18=52
Scilla [17]
The answer is

-5m-18=52
-5=52+18
-5=70
70:5=14
M=15

Hope it help
3 0
3 years ago
- 3+ 8(2 - 12r) <br>how do you solve this problem​
pochemuha
Answer: -96r + 13

1. distribute 8x2 - 8x12r
-3+8(2-12r)
-3+16-96r

2. add constants -3+16
-3+16-96r
13-96r

3. standard form
-96r + 13
6 0
3 years ago
Hi, can you please help me answer this direct proportion question?
Oksanka [162]

Answer:

X = 100

Step-by-step explanation:

  • In proportion questions, they want you to multiply one of the sides by a variable, (i usually represent it with K) and then change the proportion sign to an equal.
  • This is because proportional means they have a ratio between them, with one side increasing by "k" for each increase in the other side.
  1. Multiply the left by k, so y = \frac{k}{\sqrt{x} }
  2. we know that y= 5, for x = 36, so sub this in the equation
  3. 5 = \frac{k}{\sqrt{36} }
  4. simplify5 = \frac{k}{6 }
  5. re-arrange for k, <u>k = 5*6 = 30</u>
  6. now we know k, we can create the real equation, y = \frac{30}{\sqrt{x} }
  7. sub in 3 as y
  8. 3 = \frac{30}{\sqrt{x} }
  9. <u>x = 100</u>
4 0
2 years ago
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