This graph represents a proportional relationship between the number of months, x, data is used on a cell phone and the total co
st of data usage, y.
The equation that represents the graph above is y =
x.
The cell phone company decides to raise the data prices to charge $90 every 2 months. The new equation that would represent this relationship is y =
x.
The equation that represents the graph above is y =
x.
The cell phone company decides to raise the data prices to charge $90 every 2 months. The new equation that would represent this relationship is y =
x.
1 answer:
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Answer:
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Step-by-step explanation:
Given
In 1990; Income= $39000
In 2010; Income= $70768
Solving (a): An equation in form of f(x) = ax + b
First, we need to determine the slope, a
Taking y as income and x as year index.
When x = 0; y = 39000
When x = 20; y = 70768
Substitute these values in the above formula
Next, is to determine the formula using:
<em>Considering :When x = 0; y = 39000, we have</em>
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<em>Make y the subject of formula</em>
<em /><em />
<em />
<em>Express y as a function of x</em>
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Solving (b): Income in 2005
<em>In 2005, x = 15</em>
So:
becomes
For this case we can rewrite the expressions as:
That is, we run the decimal three times to the left.
That is, we run the decimal six times to the left.
So:
So, we have that is 0.002996 times bigger than
Answer:
is 0.002996 times bigger than