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Turtlelover05
01.07.2019 •
Mathematics
1. refer to the equation 4x – 2y = 12 (a) create a table of values for at least 4 points. show your work. (b) use the table of values to graph the line
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Ответ:
Refer to the equation 4x – 2y = 12
To make a table we need to solve for y
4x – 2y = 12
Subtract 4x on both sides
-2y = -4x + 12
Now divide the whole equation by -2
y = 2x - 6
Now we assume 4 values for x and find out y to make a table
x y = 2x-6
0 y= 2(0) -6 = -6
1 y= 2(1) -6 = -4
2 y= 2(2) -6 = -2
3 y= 2(3) -6 = 0
We got 4 points (0,-6) (1,-4) (2,-2) and (3,0)
Use the table and graph the line
Graph is attached below
Ответ:
Part A. The standard form of a rate equation is:
y = Ao (1 + r)^x
Where,
Ao = represents the initial value
r = represents the rate of growth
Therefore rewriting the given f(x) equation in this form:
f(x) = 2.96 (1 + 0.04)^x
r = 0.04 = 4%
Hence, the price of fuel A is increasing each month by 4%.
We can prove this by assuming two values of x = 1 and 2 and getting the ratio:
f(x=2) / f(x=1) = 2.96(1.04)^2 / 2.96(1.04) = 1.04
Since ratio is 1.04, therefore there is in fact a 4% increase.
Part B. To determine the growth rate of fuel B, let us take the ratio of months 1 and 2.
3.22 / 3.04 = 1.06
r = 0.6 = 6%
Therefore the fuel with a greater percentage change in price per month is fuel B.