The table below represents a linear function f(x) and the equation represents a function g(x).


x f(x)
−1 −11
0 −1
1 9
g(x)

g(x) = 5x + 1



Part A: Write a sentence to compare the slope of the two functions and show the steps you used to determine the slope of f(x) and g(x). (6 points)

Part B: Which function has a greater y-intercept? Justify your answer. (4 points)

Respuesta :

Answer: The slope of f(x) is 10 the slope of g(x) is 5.  g(x) has a greater y-intercept.

Explanation:

From the table it is noticed that the line f(x) passes through the points (-1,-11) and (0,-1).

Slope of the line,

[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]

[tex]m=\frac{-1-(-11)}{0-(-1)} =\frac{10}{1}=10[/tex]

Therefore the slope of f(x) is 10 and the y intercept is (0,-1).

[tex]y=mx+b[/tex]

Where m is the slope and b is the y-intercept.

[tex]g(x)=5x+1[/tex]

On comparing g(x) with slope intercept form we get,

[tex]m=5,b=1[/tex]

Therefore slope of g(x) is 5 and the y intercept is (0,1).

Therefore the slope of f(x) is greater than g(x) and the function g(x) has a greater y-intercept.

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