Compare Linear Function 1 with Linear Function 2. Which one has the greater rate of change?

Linear Function 1: y=15x+8
Linear Function 2:
This table presents x and y values for two linear functions to analyze and compare their rates of change and y-intercepts.
x
y
5 26
13 34
(1 point)
Responses

Linear Function 1 has the greater rate of change, with a rate of change equal to 8 while Linear Function 2 has a rate of change equal to 1.
Linear Function 1 has the greater rate of change, with a rate of change equal to 8 while Linear Function 2 has a rate of change equal to 1.

Linear Function 2 has the greater rate of change, with a rate of change equal to 21 while Linear Function 1 has a rate of change equal to 15.
Linear Function 2 has the greater rate of change, with a rate of change equal to 21 while Linear Function 1 has a rate of change equal to 15.

Linear Function 2 has the greater rate of change, with a rate of change equal to 21 while Linear Function 1 has a rate of change equal to 8.
Linear Function 2 has the greater rate of change, with a rate of change equal to 21 while Linear Function 1 has a rate of change equal to 8.

Linear Function 1 has the greater rate of change, with a rate of change equal to 15 while Linear Function 2 has a rate of change equal to 1.
Linear Function 1 has the greater rate of change, with a rate of change equal to 15 while Linear Function 2 has a rate of change equal to 1.

1 answer

To compare the rates of change of the two linear functions, we need to analyze the slope of each function.

  1. Linear Function 1:

    • The equation is given as \( y = 15x + 8 \).
    • The slope (rate of change) is 15.
  2. Linear Function 2:

    • We don't have the equation but have the data from a table of points.
    • Given points:
      • For \( x = 5 \), \( y = 26 \)
      • For \( x = 13 \), \( y = 34 \)
    • To find the rate of change, we use the formula for slope: \[ \text{slope} = \frac{y_2 - y_1}{x_2 - x_1} \]
    • Here, \( (x_1, y_1) = (5, 26) \) and \( (x_2, y_2) = (13, 34) \): \[ \text{slope} = \frac{34 - 26}{13 - 5} = \frac{8}{8} = 1 \]

Now we have:

  • Linear Function 1: Rate of change = 15
  • Linear Function 2: Rate of change = 1

Comparison:

  • Linear Function 1 has a greater rate of change (15) compared to Linear Function 2 (1).

The correct response is: Linear Function 1 has the greater rate of change, with a rate of change equal to 15 while Linear Function 2 has a rate of change equal to 1.