He earns 300 reward points for every 100 dollars he spends. If he earned 1,800 reward points, how much money did he spend

$600

Step-by-step explanation:

1800/300 = 6, so he got 6 'lots' of reward points

6 * 100 = $600

He spent $600

Step-by-step explanation:

What you do is 1800/300= 6, so 100 × 6 = $600

4 + 5 7/9= 9 7/9

step-by-step explanation:

a function could be identified in 3 ways either on a chart,graph, or ordered pairs. first a function is that each point has its own. the rule is that there can be many x's to one y but there can not be 2 x's at different y's. so on a graph when you put a straight line through the y's there should be one dot only to be a function.

step-by-step explanation: