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A charm bracelet costs $65, plus $25 for each charm. The equation -25x+y=65 represents the cost y (in dollars) of the bracelet, where x is the number of charms.

a. Graph the equation.
b. How much does a bracelet with three charms cost?

User IceFire
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2 Answers

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*This answer may be wrong (part a), so make sure to double check with someone trustworthy. Feel free to tell me if I had made any mistakes, and I will fix them. Congrats if you read through my whole answer! Good luck!

Answer (a):

Coordinate: (0, 65)

Slope: -25

Explanation:

Hint: In the graph, make one space represent 5 units to make the graph simpler (be careful on step #4 when plotting)

1.) Find the y - intercept to find a coordinate the line goes through.

2.) Rewrite the equation -25x + y = 65 in slope - intercept form.

y = 25x + 65

65 is the y - intercept at (0, 65)

3.) The slope is -25, so the slope is negative. To have a slope of 25, we can use the rise/run formula for the slope.

4.) Go 25 units to the left (to get to -25) and one unit down. Plot this point in the graph.

5.) After you have plotted these two points down (y - intercept and slope), draw a line through it.

Answer (b):

$140

Explanation:

1.) We plug in 3 in x because it has three charms.

2.) New equation: -25(3) + y = 65

-75 + y = 65

3.) We add 75 to both sides to isolate y.

-75 + y = 65

+75 + y = 65 + 75

y = 140

User FieryCat
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21 votes
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b 140
A charm bracelet costs $65, plus $25 for each charm. The equation -25x+y=65 represents-example-1
User Luis Soeiro
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3.2k points