Question

Compare the functions:

Function A:

y=−3x+2


Function B:
x y
1 4
2 6
3 8
4 10
(1 point)
Responses

Function A is decreasing, while Function B is increasing AND Function B is steeper.
Function A is decreasing, while Function B is increasing AND Function B is steeper.

Function A is decreasing and Function B is also decreasing AND Function A is steeper.
Function A is decreasing and Function B is also decreasing AND Function A is steeper.

Function A is decreasing, while Function B is increasing AND Function A is steeper.
Function A is decreasing, while Function B is increasing AND Function A is steeper.

Function A is increasing, while Function B is decreasing AND Function B is steeper.
Function A is increasing, while Function B is decreasing AND Function B is steeper.

1 answer

To compare the functions, let's analyze each one.

Function A:
The equation is given as \( y = -3x + 2 \).

  • The slope (coefficient of x) is -3. Since the slope is negative, this indicates that Function A is decreasing.

Function B:
The values given for Function B are:

  • When \( x = 1 \), \( y = 4 \)
  • When \( x = 2 \), \( y = 6 \)
  • When \( x = 3 \), \( y = 8 \)
  • When \( x = 4 \), \( y = 10 \)

To determine the behavior of Function B, observe the \( y \) values:

  • The values of \( y \) increase as \( x \) increases.
  • This indicates that Function B is increasing.

Now, we need to determine the steepness or rate of change for both functions.

  • Steepness of Function A: The slope is -3.
  • Steepness of Function B: Let's calculate the slope using the changes in y-values:
    • From \( y = 4 \) to \( y = 6 \) (change of 2 over a change of 1 in x) gives a slope of \( \frac{2}{1} = 2 \).
    • The same applies for other points—so the slope for Function B is +2.

Comparing steepness:

  • Function A has a slope of -3 (decreasing).
  • Function B has a slope of +2 (increasing).

Since we are looking at the absolute values of the slopes for steepness:

  • The steepness of Function A is |−3| = 3.
  • The steepness of Function B is |2| = 2.

Conclusion:

  • Function A is decreasing.
  • Function B is increasing.
  • Function A is steeper than Function B because 3 > 2.

Therefore, the correct response is:

"Function A is decreasing, while Function B is increasing AND Function A is steeper."