Answer:
The cost of renting the car for 20 days is $481
Step-by-step explanation:
The table of values can be formed as follows;
Day,   Cost
1,         $44
2,        $67 
3,        $90
4,        $113
7,        $182
10,      $251
 From the given values and the scatter plot, there is a straight line relationship between the cost and the number of days of rental of a car.
The line of best fit is therefore a straight line and from the constant increase in cost ($23) for each extra day of rental, it is possible to find the slope, m, of the data as follows;

(x₁, y,) and (x₂, y₂) can be taken as (1, $44) and (3, $90) respectively to give;

The equation in slope and intercept form is therefore, y  - 44 = 23×(x - 1), which gives;
y - 44 = 23·x - 23
y = 23·x - 23 + 44 = 23·x + 21
The cost of renting the car for 20 days is then;
10×23 + 21 = $481
The cost of renting the car for 20 days = $481.