This kind of question usually accompanies a specific table of ordered pairs. The idea is that the ordered pairs take the form of (x, f(x)) where the first number of the ordered pair x, is a value of the variable for some equation. When that value is used in place of the variable in the equation, we can calculate a specific value. That calculated value appears as the second value of the ordered pair and is represented by f(x) above. Typically the equation is relatively simple, such as a linear equation or a quadratic equation.
Therefore, in order to determine the equation, we have to know exactly what the ordered pairs are.
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In general you cannot. Any set of ordered pairs can be a graph, a table, a diagram or relation. Any set of ordered pairs that is one-to-one or many-to-one can be an equation, function.
Given a value for the variable x, you find (calculate) the corresponding value of y. These (x, y) pairs are part of the table. You cannot complete the table because there are infinitely many possible values of x.
slope = change in y values divided by change in x values. m = (y2-y1)/ (x2-x1) pick 2 ordered pairs from the table and use the formula above.
The equation which remains true for each set of variables in the table.
A conversion table.A conversion table.A conversion table.A conversion table.