Estimate the line of best fit using two points on the line

Step-by-step explanation:

The line that best fits is shown in the given graph.

To find the equation that represent that red line, we first have to find its slope and then use the point-slope formula.

The slope is defined as

We are gonna use points (0,20) and (3,44)

Then, we use the point-slope formula, with the slope we found and the point (0,20)

Therefore, the right answer is B.

probably .5

i can on others if necessary.

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.