Question

(b) customers of a certain credit card earn points for using the card. the table below shows the number of points earned for the amount spent.

number of points	30	70	90

choose the correct description.

• each dollar spent does not always earn the same number of points.
• each dollar spent appears to earn the same number of points.

predicted number of points for spending $10: \square

Explanation:

Step1: Calculate points per dollar

For each pair:
$\frac{30}{3}=10$, $\frac{70}{7}=10$, $\frac{90}{9}=10$

Step2: Verify consistency

All ratios equal 10, so points per dollar are same.

Step3: Predict points for $10

Multiply dollars by points per dollar: $10 \times 10 = 100$

Answer:

Correct description: Each dollar spent appears to earn the same number of points.
Predicted number of points for spending $10: 100