Question

The equation y = 2.1x represents the relationship between x, the number of tickets, and y, the price Which ordered pairs represent a number of tickets and the corresponding price in the given equation? Choose ALL that apply (3,6.3) (6.3,3) (2.1, 10.5) (7, 14.7) (10.5, 2.1) (14.7, 7)​

Answer 1

They are (3, 6.3) and (7, 14.7)

Answer 2

(3,6.3), (7, 14.7)

Explanation:

For this question, you want to find the values where 2.1×x is the same as y. It's mostly just trial and error.

x is always first in the bracket, so by multiplying it by 2.1, you would get y (the second value) if it applies.

3*2.1=6.3, so the first one is true.

6.3*2.1=13.23, so the second one is false.

2.1*2.1=4.41, so the third one is false.

7*2.1=14.7, so the fourth one is true.

10.5*2.1=22.05, so the fifth one is false.

14.7*2.1=30.87, so the sixth one is false.

This leaves the first one (3,6.3) and the fourth one (7, 14.7) as true.

** This is mostly algebra, so you may want to look at that. If this question was supposed to be done without a calculator, look at multiplying decimals too. I'm always happy to help!