College Algebra
posted by Cupcake .
These are the points on the graph!
O year = $41000
1 year = $43000
2 year = $46000
3 year = $48500
The following graph shows Bob’s salary from the year 2002 to the year 2005. He was hired in the year 2002; therefore t = 0 represents the year 2002.
List the coordinates of any two points on the graph in (x, y) form.
(___, ___),(___, ___)
b) Find the slope of this line:
Answer:
Show your work here:
c) Find the equation of this line in slopeintercept form.
Answer:
Show or explain your work here:
d) If Bob’s salary trend continued, what would his salary be in the year 2008?
Answer:
Show or explain your work here:

Find the equation of this line in slopeintercept form.
Answer:
Show or explain your work here:
d) If Bob’s salary trend continued, what would his salary be in the year 2008?
Answer:
Show or explain your work here: 
Sorry I didn't see the followup on your other question.
Slopeintercept form is y = mx + b, where m is slope and b is the yintercept.
You can easily calculate the slope. It's change in y over change in x. (48500  41000)/(3  0) = 7500/3 = 2500.
The yintercept occurs at x=0, so from what you've provided, it is 41,000.
Therefore, we have...
y = 2500x + 41,000 
I'm lost

What part are you having trouble with?
Do you understand the equation for slopeintercept form?
Do you understand how to calculate slope?
Do you understand how to find the yintercept? 
No, I don't understand any of it.

The definition for slopeintercept form is y = mx + b. The m is slope, and b is the yintercept. It's a definition; you just have to memorize it.
For two points (x1, y1) and (x2, y2), the slope is (y2  y1)/(x2  x1).
For (4, 2) and (3, 1), the slope is (2   1)/(4  3) = (2 + 1) / (4  3) = 3 / 1 = 3.
The yintercept is where the line crosses the graph on the yaxis. The yaxis crosses the xaxis at x=0, so the yintercept is always at x=0.
If you have any questions, let me know.
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