As cell phones proliferate, the number of pay phones continues to drop. The number of pay phones from 2004 through 2009 (in millions) are shown in the following table  (x = 0 corresponds to 2004). Year, x 0 1 2 3 4 5 Number of Pay Phones, y 1.30 1.15 1.00 0.84 0.69 0.56 (b) Derive an equation for the line L. (c) Using the equation in part (b), estimate the number of pay phones in 2011.

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A:

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A: Topic- linear function

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A: Given,

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A:

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A: Given that fx=3x2-10x+1 at x=3Solution :equation of line in slope intercept…

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A:

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A: GIVEN: lines passes through (1, -1)                Slope = 4

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A: Put x=0 on the equation and the find the value of y

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A:

Q: B - Find the equation of the curve whose slope at any point p(x.y) is m = x(x+5)², and passing…

A: slope m at (2,1)  m = 2(2+5)2 m = 2*49 m = 98 so line equation y - y0 = m(x - x0 ) y -1 = 98(x - 2)…

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A: I

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Q: 14) through: (1, 3), perp. to y = x + 4

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A:

Q: What is the slope of the curve at the point (0, 1). x^2+y^2-12x+4y=5

A:

Q: Step 3 Substitute the slope and the point (0, 710) into the point-slope form y-Y1 m(x-x1), to write…

A:

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Q: Given the points (0,1) and (2,0) how would you find the slope intercept form?

A:

Q: 14. Find an equation of the line with slope -2 and y-intercept (0,4) b) y- -2x+4 d) y--2x-4 a)…

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A:

Q: x - Find the equation of the line tangent to y = at the point (– 3, – 2). Write your answer in slope…

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A:

Q: Find a general form of an equation of the line through the point A that satisfies the given…

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Q: 3. At what point is 2 the slope of the curve y = 4x +x ?

A: Given,           Slope of the curve = 2    Curve y = 4x+x2         First we find y'        y'=  4+2x

Q: The line shown above has an y-intercept of T

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Q: How do you find an equation of the line L? L is parallel to y=-3x

A: ANSWER : y = -3x -5   EXPLANATION :

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Q: - The average annual cost (in dollars) of tuition and fees at public four-year colleges for the year…

A: Let x be the year and y be the cost when x=2, y=$4098 and when x=9,  y=$7020

Q: A researcher monitoring the power from the solar panels on a Mars lander has developed a linear…

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.