How does f(x) = 10x change over the interval from x = 5 to x = 6?
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Omar spent 600 dollars for earning 1800 reward points.
<em><u>Explanation</u></em>
Omar earns 300 reward points for every 100 dollars he spends.
Suppose, he spent dollar for 1800 reward points.
Now <u>according to the ratio of "amount of money spent" and "reward points"</u> , the equation will be......
Thus, Omar spent 600 dollars for earning 1800 reward points.