Question 1168826
Let's break this down step-by-step:

**1. Predicted Calories**

* We're given the least squares regression equation:
    * predicted calories = 89.5 + 2.5(sugar grams)
* The cereal contains 19 grams of sugar.
* Let's plug that into the equation:
    * predicted calories = 89.5 + 2.5(19)
    * predicted calories = 89.5 + 47.5
    * predicted calories = 137

**2. Residual**

* The residual is the difference between the actual value and the predicted value.
* We're given a residual of +53 calories.
* residual = actual calories - predicted calories
* 53 = actual calories - 137

**3. Actual Calories**

* To find the actual calories, we can rearrange the residual equation:
    * actual calories = residual + predicted calories
    * actual calories = 53 + 137
    * actual calories = 190

**Therefore, the actual number of calories contained in one serving of this cereal is 190.**