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 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 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 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.

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.

1 answer

To compare the rates of change for the two linear functions, we start with Linear Function 1 and then find the rate of change for Linear Function 2 from the provided data.

Linear Function 1:

The function is given in slope-intercept form \( y = 15x + 8 \).

  • The rate of change (slope) is the coefficient of \( x \), which is 15.

Linear Function 2:

We need to determine the rate of change from the provided table. The table has the following data points:

  • When \( x = 5 \), \( y = 26 \)
  • When \( x = 13 \), \( y = 34 \)

To find the rate of change (slope), we can use the formula: \[ \text{slope} = \frac{\Delta y}{\Delta x} = \frac{y_2 - y_1}{x_2 - x_1} \] Using the points \( (5, 26) \) and \( (13, 34) \):

  • \( y_1 = 26 \), \( y_2 = 34 \)
  • \( x_1 = 5 \), \( x_2 = 13 \)

Now plug in the values: \[ \text{slope} = \frac{34 - 26}{13 - 5} = \frac{8}{8} = 1 \]

Summary of Rates of Change:

  • Linear Function 1 has a rate of change of 15.
  • Linear Function 2 has a rate of change of 1.

Conclusion:

Linear Function 1 has the greater rate of change, which is 15, compared to Linear Function 2’s rate of change of 1.

So the correct response would be: 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.