why have they mentioned that bananas are being sacrificed to gain apples aren't an apple each being sacrificed to gain - Economics - Theory of Consumer Behaviour

Question

why have they mentioned that bananas are being sacrificed to gain
apples aren't an apple each being sacrificed to gain 2 bananas?in
that case wouldn't slope be 1/2 please explain

Shvetika Sharma · Accepted Answer

Dear student,
The diagram can be read both ways However, in the calculation of
slope it is calculated as the ratio of change in the units of
y-axis and change in the units of x-axis
In this way, as per the given diagram it is the ratio of units of
bananas willing to sacrifice upon the units of apples gained