Doug is crocheting a scarf as a birthday present for his sister. He started the scarf yesterday and needs to finish it today before his sister's birthday party.

This table shows the relationship between the amount of time (in minutes) Doug spends crocheting today, x, and the total length of the scarf (in inches), y.
x (minutes) y (inches)
30 20
40 21
80 25
110 28
According to the values in the table, do x and y have a proportional relationship?
yes
no

User Icon for Bot GPT 4-o mini Bot GPT 4-o mini answered
6 hours ago

To determine if \( x \) (the time spent crocheting in minutes) and \( y \) (the total length of the scarf in inches) have a proportional relationship, we need to check if the ratio \( \frac{y}{x} \) is constant for all pairs of values.

Calculating the ratios:

  1. For \( (30, 20) \): \[ \frac{y}{x} = \frac{20}{30} = \frac{2}{3} \]

  2. For \( (40, 21) \): \[ \frac{y}{x} = \frac{21}{40} = 0.525 \]

  3. For \( (80, 25) \): \[ \frac{y}{x} = \frac{25}{80} = 0.3125 \]

  4. For \( (110, 28) \): \[ \frac{y}{x} = \frac{28}{110} \approx 0.2545 \]

Since the ratios are not the same, \( \frac{y}{x} \) is not constant across the values.

Therefore, \( x \) and \( y \) do not have a proportional relationship.

The answer is: no.