Answer:
$20
Step-by-step explanation:
the manager's error could likely be putting the percentage mark up rather than the markup price added to the original price
25%×16
= $4
mark up price= (16+4)$
= $20
I believe that the last one is true
because the linear equations are
y=ax+b
which means that the point of y-axis is on one side and the slope, point on x-axis and y-intercept are on the other side
good luck