Which table shows a proportional relationship between x and y?
2 answers:
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Answer:
$180
Step-by-step explanation:
Since the cost of the telescope with the 30% discount is $126 then $126 is 70% of the original price. Remember 100-30=70. To find the original price set up a proportion with these values:
Solve for the original price by cross multiplying numerator with denominator.
x(70) = 126(100)
70x = 12600
x= $180
Percentages are out of 100. So we'll multiply by 0.85 to represent the 15%
To find the y points on the graph we can use f(x) =
We'll input 1-5 for x to find y:
1:
2:
3:
4:
5:
Therefore the answer is a graph of exponential function going down from left to right in quadrant 1 through the point 0, 40 and approaching the x-axis.
To find the y points on the graph we can use f(x) =
We'll input 1-5 for x to find y:
1:
2:
3:
4:
5:
Therefore the answer is a graph of exponential function going down from left to right in quadrant 1 through the point 0, 40 and approaching the x-axis.