Answer:
9) slope= (-1/5) y-intercept is 1 equation is y=-1/5x+1
11) slope= (-1/5) y-intercept is -4 equation is y=-1/5x-4
13) slope= (-4) y-intercept is 5 equation is y=-4x+5
Step-by-step explanation:
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It will cost 6.50$ because you divide 15.60/12 to find how much one pound is and then multiply by five to get $6.50
Since x is basically any number, there are many solutions when you replace x. such as 1,3,4 etc. and it will always be true.
