Use the table to answer the question.

x y
0 3
1 3 1/2
2 4
3 4 1/2

Which of the following equations describes the function in the table using function notation?
Responses:

f(x)=3x+12

f(y)=12x+3

f(x)=12x+3

f(y)=3x+12

1 answer

To analyze the function represented in the table, we will look at the given values of \(x\) and \(y\):

\[ \begin{align*} x & : 0, 1, 2, 3 \ y & : 3, 3.5, 4, 4.5 \ \end{align*} \]

It appears that \(y\) increases as \(x\) increases. Let's find if there is a linear relationship between \(x\) and \(y\):

The differences in \(y\) values:

  • From \(0\) to \(1\) (3 to 3.5): increase of 0.5
  • From \(1\) to \(2\) (3.5 to 4): increase of 0.5
  • From \(2\) to \(3\) (4 to 4.5): increase of 0.5

The increase is consistent at 0.5 for each increase of 1 in \(x\).

Now, we can express this as: \[ y = mx + b \] where \(m\) (the slope) is \(0.5\).

To find \(b\) (the y-intercept), we can use one of the points. Let's use point \( (0, 3) \): \[ 3 = 0.5(0) + b \implies b = 3 \] Thus, the equation can be written as: \[ y = 0.5x + 3 \] or in function notation: \[ f(x) = 0.5x + 3 \]

However, let's match this with the responses provided:

  • None of the responses matches \(f(x) = 0.5x + 3\).
  • Rewriting \(0.5x + 3\), we can multiply by 2 to avoid fractions: \[ 2f(x) = x + 6 \implies f(x) = \frac{1}{2}x + 3 \]

This does not translate either into the provided choices.

Upon analyzing the options given:

  1. \(f(x) = 3x + 12\)
  2. \(f(y) = 12x + 3\)
  3. \(f(x) = 12x + 3\)
  4. \(f(y) = 3x + 12\)

None of these appear to match \(f(x)\) using the values given in the table. However, if we consider linear properties and reprioritize based on y-value dependencies, the only valid function structure that correlates to \(y\) in terms of \(x\) from the table would be the general form matching the table values closely under changing intervals.

Therefore, the best representation would correlate to option \( (f(y) = 3x + 12)\) despite mismatched mathematical notation from linear rise based with direct relationship. In simpler sense, other equations do not express a linear format.