Answer:
<u>Step-by-step explanation:</u>
1 is <span>y = 15x, in 9 years he will have saved $13,500
2 is </span><span>x2 − 4x − 21
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Answer: the slope is 2/1 or 2
Step-by-step explanation: slope is written rise over run, meaning y/x. By finding the difference between 13/5 and 17/7, then 17/7 and 21/9 to confirm, you can see that the difference is 4/2, which reduces to 2/1, which is simplified to 2.