Which table could be a partial set of values for a linear function? x y 0 0 1 2 2 8 3 18 x y 0 3 1 5 2 7 3 9 x y 0 9 1 8 2 5 3 0 x y 0 1 1 2 2 5 3 10

The second table

Step-by-step explanation:

When x-values are uniformly spaced (1 apart, for example), y-values are also uniformly spaced (have a common difference) when the function is linear.

The second table shows a common difference of 2 between y-values, so that function is linear.

Table 1 differences are 2, 6, 10, so is likely quadratic.

Table 3 differences are -1, -3, -5, so is likely quadratic.

Table 4 differences are 1, 3, 5, so that one, too, is likely quadratic.

Comment on differences

We call the differences between table values the "first differences." Then the differences between those are "second differences." Differences between the  "n-1-th" differences are called the "n-th" differences. When n-th differences are constant (and not zero), the table values can be represented by a polynomial of n-th degree.

Hence when 1st differences are constant, the table represents a 1st-degree (linear) function. When 2nd differences are constant, the table represents a quadratic function.

-3.5 degrees per hour

step-by-step explanation:

find the unit rate:

-12   1/4 degrees           12.25 degrees

= - = -3.5 degrees per hour

      3   1/2 hours               3.5 hours