Write the linear equation that gives the rule for this table.

x y
5 44
10 59
15 74
20 89

Write your answer as an equation with y first, followed by an equals sign.

1 answer

To find the linear equation that represents the relationship between \(x\) and \(y\) in the given table, we can use the format of a linear equation:

\[ y = mx + b \]

where \(m\) is the slope and \(b\) is the y-intercept.

First, we will calculate the slope \(m\) using two points from the table:

  1. \( (5, 44) \)
  2. \( (10, 59) \)

The formula for the slope is:

\[ m = \frac{y_2 - y_1}{x_2 - x_1} \]

Using our points:

\[ m = \frac{59 - 44}{10 - 5} = \frac{15}{5} = 3 \]

Now, we have the slope \(m = 3\).

Next, we'll use one of the points to solve for \(b\). Let's use the point \( (5, 44) \):

\[ 44 = 3(5) + b \] \[ 44 = 15 + b \] \[ b = 44 - 15 = 29 \]

Now, we can write the equation:

\[ y = 3x + 29 \]

So, the final linear equation is:

\[ y = 3x + 29 \]