![mathman783](/avatars/32199.jpg)
mathman783
26.08.2019 •
Mathematics
With writing equations.
the pictures below have the questions i need with.
Solved
Show answers
More tips
- H Health and Medicine How to Lower Your Child s Temperature?...
- F Food and Cooking From Latte to Espresso: Which Coffee Drink is the Most Popular on Earth?...
- C Computers and Internet How to Set Up Internet on iPhone? Detailed Guide with Step-by-Step Instructions...
- P Philosophy 8 привычек, чтобы достичь счастливой жизни...
- F Food and Cooking How Many Grams Are In a Tablespoon?...
- G Goods and services How to Choose the Right Iron: Purchase Tips...
- S Style and Beauty How to Choose the Perfect Hair Straightener?...
- H Health and Medicine How to Choose the Right Glasses?...
- H Health and Medicine What vaccines do children need?...
- H Health and Medicine AKDS Vaccination: Ensure Your Child s Safety...
Answers on questions: Mathematics
- M Mathematics Emma buys and sells truck parts she bought two tires for $35 each and later sold them for $65 each she bought three rooms for $75 each and later sold them for $136 each she...
- M Mathematics Given f (x) = 4x2 – 8x + 14 and g(x) = 5x + 3: Find (gºf)(4)...
- M Mathematics It’s the bottom one btw. plz it’s an...
- C Chemistry What is the Percent of composition of Sulfur in CaSO4...
- H History “Wars are not over when the shooting stops.” Write a 200 word essay addressing this statement which summarizes the lessons of the documentary....
- H History 3. What do you think was Shi Huangdi s greatest accomplishment? Why?...
- P Physics Water can form large dewdrops in nature how would droplets made of vegetable oil instead of water be different...
Ответ:
on it ... The slope is ...
(difference in y-values) / (difference in x-values) .
Right ?
OK. Each line in these tables is a point on the graph of the table.
Pick two points from the table, and you can get the slope of the line
from them.
The first table (Plan-A) has these points in it:
1 . . . . . $20.15
2 . . . . . $20.30
3 . . . . . $20.45
4 . . . . . $20.60
You want to find the equation of the line with these 4 points on it.
That means you need to find the slope and the intercept of the line.
Take any two points straight from the table. I'll use the first two:
1 . . . . . $20.15
2 . . . . . $20.30
There you have two points on the line: (1, 20.15) and (2, 20.30) .
The slope is (difference in 'y') / (difference in 'x').
Difference in 'y' = (20.30 - 20.15) = 0.15
Difference in 'x' = (2 - 1) = 1
Slope of the line = (0.15) / 1 = 0.15
(What that really means is 15 cents per minute on Plan-A.)
Now you know that the equation of the line is [ y = 0.15x + intercept ].
Can you think of a way to find the intercept ?
Remember ... every point in the table is on the line.
So why not just take one of these points in the table, put it into the part of the equation that you already have, and watch the intercept fall out ?
You could use any point at all from the table.
I'll use the 3rd one.
y = 0.15x + intercept
20.45 = 0.15(3) + intercept
20.45 = 0.45 + intercept
Subtract 0.45 from each side: 20.00 = intercept
The equation of the graph for Plan-A is Charge = 0.15(minutes) + $20.00
Plan-B:
First two points:
Difference in y-values = (8.00 - 6.50) = 1.50
Difference in x-values = (10 - 5) = 5
Slope of the line = (1.50) / (5) = .30 (30 cents per minute)
Intercept = 5.00
Charge = 0.3(minutes) + $5.00
Plan-C:
Slope = 4.50 / 10 = 0.45
Intercept = zero
Plan-D:
Slope = (16.50 - 11.00) / (30 - 20) = 5.5/10 = 0.55
Intercept = zero
In each plan, the intercept is the cost just to sign up, before you use
the phone, and then the slope is the cost for each minute of talking on it.
Ответ:
i dont know
Step-by-step explanation: