Question

This scatter plot shows the foot circumference and height of 15 elephants.
The function described by the equation y=2x is a model of the relationship between an elephant's foot circumference and its height. We can substitute into this equation to predict the height of an elephant with a 90 cm foot circumference. Start by substituting 90 cm for x.
y
=
2x
y
=
2·

Answer 1

To use the equation \( y = 2x \) to predict the height of an elephant with a foot circumference of 90 cm, you can substitute \( x \) with 90 cm.

\[
y = 2 \cdot 90
\]

Now, calculate:

\[
y = 180
\]

So, the predicted height of an elephant with a foot circumference of 90 cm is **180 cm**.