Question

Need help fast please! I will medal and fan please help me! Question below

Answer 1

Sam rented a boat for 2 days for $225. He then rented the same boat for 5 days for a cost of $480.
A: right it in standard form with y being the total cost and x being the number of days
B: right it in function notation
C;describe how you would graph it

Answer 2

I... don't get it....

Answer 3

It has a typo it should be write not right

Answer 4

@iGreen

Answer 5

Just message iGreen and he'll help. :P

Answer 6

ok I did

Answer 7

bahh, sorry this it tots off topic, but i seen horse and i love equestrians cuz im one XD just had to comment

Answer 8

oh cool haha could you help as well?

Answer 9

two days cost $225, should be $112.5 per day

Answer 10

Help me please @satellite73 @iGreen @blurbendy

Answer 11

@butterflydreamer Help!!

Answer 12

@iGreen

Answer 13

I need help with A B and C I don't understand them

Answer 14

First we find the slope..we are given two points:

(2, 225) and (5, 480)

Plug them into the slope formula:

\(m = \dfrac{y_2-y_1}{x_2-x_1}\)

\(m = \dfrac{480-225}{5-2}\)

Can you simplify that? @horsegirl27

Answer 15

Ok

Answer 16

255/3

Answer 17

85/1

Answer 18

Is that right?

Answer 19

@iGreen

Answer 20

Yes.

Answer 21

So the slope is 85.

Answer 22

Ok. What's the next step?

Answer 23

So to figure out the equation we plug in the slope with one of the two points we have..let's take the first point, (2, 225) and we plug it into point-slope form.

\(y - y_1 = m(x - x_1)\)

Where \(y_1\) is the y-value of the point, \(x_1\) is the x-value of the point, and \(m\) is the slope.

\(y - 225 = 85(x - 2)\)

Distribute 85 into the parenthesis:

\(y - 225 = 85x - 170\)

Now add 225 to both sides, what do you get?

Answer 24

y=85x+55

Answer 25

Is that right @iGreen

Answer 26

Yep, you got it..so that's our equation.

Answer 27

Oh wait..it says in standard form..so we have to change it to:

\(Ax + By = C\)

Answer 28

We do need it that way also I think

Answer 29

\(y = 85x + 55\)

Subtract 85x to both sides:

\(85x - y = 55\)

Answer 30

There we go..

Answer 31

So that is A?

Answer 32

Okay, for B, function notation is just solving for 'y' then replacing 'y' with 'f(x)'.

We already had y = 85x + 55, so just replace 'y' with 'f(x)'.

Answer 33

Yes, that was A.

Answer 34

Thanks so much!

Answer 35

Now what is B? I forgot function notation lol

Answer 36

I just told you :P

Answer 37

oh cool lol haha

Answer 38

Now for C I need to describe what the graph would look like. I have to mention the y-intercept, labels, intervals...

Answer 39

I need help with that.

Answer 40

@iGreen

Answer 41

Okay, well the x-axis will be labeled 'days', and the y-axis will be labeled 'cost'.

The y-intercept is given in our formula 'y = 85x + 55', which is 55.

And the line would go through the two points (2, 225) and (5, 480).

Answer 42

\(\\\bbox [10pt, #00ffab,border:5pt solid blue ]{\color{#872AF0}{\huge\cal ~\heartsuit Thanks!\heartsuit}}\)

Answer 43

Thank you so much

Answer 44

No problem.