Wednesday

March 4, 2015

March 4, 2015

Posted by **Carmen** on Wednesday, October 15, 2008 at 10:46pm.

the linear equation: y = 0.15x + 0.79 represents an estimate of the average cost of gas for year x starting in 1997. the year 1997 would be represented by x = 1, for example, as it is the first year in the study. similarily, 2005 would be year 9, or x=9.

a) what year would be represented by x = 4? 2000

b) what x-value represents the year 2018? 22

c) what is the slope (or rate of change) of thsi equation?

2018: 0.15(22) + 0.79 = $4.09

1997: $0.94

4.09–0.94 divided by 2018-1997

= 3.15 divided by 21

= 0.15

= answer is $0.15 per year

d) what is the y-intercept? no idea

e) what does the y-intercept represent? where the line crosses on the graph

f) assuming this growth trend continues, what will the price of gas be in 2018? how did you arrive at thsi answer?

2018: 0.15(22) + 0.79 = $4.09

1997: 0.15(1) + 0.79 = $0.94

4.09–0.94 divided by 2018-1997

= 3.15 divided by 21

= 0.15 = $0.15 per year

- Math 116 -
**drwls**, Thursday, October 16, 2008 at 7:32ama, b and c are correct.

d) The y-intersept (where x = 0) is y = 0.79

e) The x-intercept (where y = 0) is

x = -0.79/0.15 = -5.267

f) $4.09 is correct. Your other calculations are unnecessary

**Answer this Question**

**Related Questions**

Math 116 - could someone please help me with this question. I have no clue where...

equations - I am not great at equations... I keep practicing and working these ...

equations - I am not great at equations... I keep practicing and working these ...

Math 116 - What similarities and differances do you see between functions and ...

Algebra - 3. The linear equation y=0.15x+.079 represents an estimate of the ...

equations - The linear equation y=0.15x + 0.79 represents an estimate of the ...

math 116 Help Please - 1. Suppose you are at the gas station filling your tank ...

maath 116 - 3. The linear equation represents an estimate of the average cost of...

algebra - The linear equation y=0.15x+0.79 represents an estimate of the average...

algebra - the linear equation y=0.15x+0.79 A)what year would be represented by x...