Question

Describe the steps to graph the equation obtained above on the coordinate axes. Mention the labels on the axes and the intervals.

Answer 1

f(x) = 80x + 65

We know that 65 is our y intercept. So (0,65) is one point.
We also know that 80 is our slope.
From our equation, we know that every time x increases by one unit, y will increase by 80 units. So we also have (4,385) for example.

Answer 2

All you have to do to graph something is find a minimum of two points, then draw a line between them.

Answer 3

Do you get it Rocker?

Answer 4

I'm piecing it together..

Answer 5

f(x) = 80x + 65
Let x = 4
f(4) = 80(4) + 65
f(4) = 320 + 65
f(4) = 385
y = 385 x = 4
(4,385)
You can let x be any value you want to find the corresponding value of y.

Answer 6

So find two points and graph them?

Answer 7

Yeah. :D

Answer 8

And label the points inbetween?

Answer 9

You only need two ordered pairs, because a line is infinite. If you labeled all the points on a line, you'd have to be stuck in limbo for all of eternity.

Answer 10

So, how about x =4, and x= 6? xD then I get those ordered pairs and I put the pairs in as the answer?

Answer 11

f(x) = 80x + 65
x = 4
Try solving it.

Answer 12

f(x) = 80x + 65
f(4) = 80(4) + 65
f(4) = 320 + 65
f(4) = 385

Answer 13

So, (4, 385)

Answer 14

perfect :D

Answer 15

now let x = 6
f(x) = 80x + 65

Answer 16

f(x) = 80x + 65
f(6) = 80(6) + 65
f(6) = 480 + 65
f(6) = 545

(6, 545)

Answer 17

You have mastered the f(x).

Answer 18

:D

Answer 19

I understand how to find f(x) xD but the question has me in a whirl.

Answer 20

Well just say that you have to solve for two points, and then show your work solving for x = 8 and x = 0.

Just so you know, when you set x to zero, you'll find your y intercept.

Answer 21

Okay. So.. My answer is the work for, and the two points, right?

Answer 22

Yes, but make sure to describe each step as you do it, like
1. Solve for f(1)
Which is just saying let x = 1.

Answer 23

I'm assuming that 'interval' is the slope. Which you know already.

Answer 24

Yes. lol

Answer 25

Cool, four more right?

Answer 26

So this is my answer for the whole section, right?

Answer 27

And five more.

Answer 28

You have to describe your steps in part C.

Answer 29

Meaning?

Answer 30

Explain why I'm doing what, as I'm doing it?

Answer 31

Also, you don't let f(x) = 6, you solve for f(6).

Answer 32

f(x) = 6 is it's own equation.

Answer 33

Ohh, okay.

Answer 34

Show me your result when it's done.

Answer 35

What do you mean by describe

Answer 36

"solve for f(0)"?

Answer 37

Solve for f(x) = 80x + 65 when x = 4.
f(4) = 80(4) + 65 [Substitute 4 for x]
f(4) = 320 + 65 [Simplify]
f(4) = 385 [Simplify]
y = 385 [Substitute f(4) for y]
(4, 385) [Graph point]

Answer 38

Ahhh, okay. Haha,

Answer 39

Yeah. :D

Answer 40

Yay! Thanks, ready for the next?

Answer 41

Post it. :)