Question
Function
Find the x-intercept/zero
Find the y-intercept
Find the slope
x=0
Evaluate
3y=2x×9
To find the x-intercept,set y=0
3×0=2x×9
Any expression multiplied by 0 equals 0
0=2x×9
Multiply the terms
0=18x
Swap the sides of the equation
18x=0
Solution
x=0
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Solve the equation
Solve for x
Solve for y
x=6y
Evaluate
3y=2x×9
Multiply the terms
3y=18x
Swap the sides of the equation
18x=3y
Divide both sides
1818x=183y
Divide the numbers
x=183y
Solution
x=6y
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Testing for symmetry
Testing for symmetry about the origin
Testing for symmetry about the x-axis
Testing for symmetry about the y-axis
Symmetry with respect to the origin
Evaluate
3y=2x9
Simplify the expression
3y=18x
To test if the graph of 3y=18x is symmetry with respect to the origin,substitute -x for x and -y for y
3(−y)=18(−x)
Evaluate
−3y=18(−x)
Evaluate
−3y=−18x
Solution
Symmetry with respect to the origin
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Rewrite the equation
Rewrite in polar form
Rewrite in standard form
Rewrite in slope-intercept form
r=0θ=arccot(61)+kπ,k∈Z
Evaluate
3y=2x×9
Evaluate
3y=18x
Move the expression to the left side
3y−18x=0
To convert the equation to polar coordinates,substitute x for rcos(θ) and y for rsin(θ)
3sin(θ)×r−18cos(θ)×r=0
Factor the expression
(3sin(θ)−18cos(θ))r=0
Separate into possible cases
r=03sin(θ)−18cos(θ)=0
Solution
More Steps

Evaluate
3sin(θ)−18cos(θ)=0
Move the expression to the right side
−18cos(θ)=0−3sin(θ)
Subtract the terms
−18cos(θ)=−3sin(θ)
Divide both sides
sin(θ)−18cos(θ)=−3
Divide the terms
More Steps

Evaluate
sin(θ)−18cos(θ)
Use b−a=−ba=−ba to rewrite the fraction
−sin(θ)18cos(θ)
Rewrite the expression
−18sin−1(θ)cos(θ)
Rewrite the expression
−18cot(θ)
−18cot(θ)=−3
Multiply both sides of the equation by −181
−18cot(θ)(−181)=−3(−181)
Calculate
cot(θ)=−3(−181)
Calculate
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Evaluate
−3(−181)
Multiplying or dividing an even number of negative terms equals a positive
3×181
Reduce the numbers
1×61
Multiply the numbers
61
cot(θ)=61
Use the inverse trigonometric function
θ=arccot(61)
Add the period of kπ,k∈Z to find all solutions
θ=arccot(61)+kπ,k∈Z
r=0θ=arccot(61)+kπ,k∈Z
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Find the first derivative
Find the derivative with respect to x
Find the derivative with respect to y
dxdy=6
Calculate
3y=2x9
Simplify the expression
3y=18x
Take the derivative of both sides
dxd(3y)=dxd(18x)
Calculate the derivative
More Steps

Evaluate
dxd(3y)
Use differentiation rules
dyd(3y)×dxdy
Evaluate the derivative
More Steps

Evaluate
dyd(3y)
Use differentiation rule dxd(cf(x))=c×dxd(f(x))
3×dyd(y)
Use dxdxn=nxn−1 to find derivative
3×1
Any expression multiplied by 1 remains the same
3
3dxdy
3dxdy=dxd(18x)
Calculate the derivative
More Steps

Evaluate
dxd(18x)
Use differentiation rule dxd(cf(x))=c×dxd(f(x))
18×dxd(x)
Use dxdxn=nxn−1 to find derivative
18×1
Any expression multiplied by 1 remains the same
18
3dxdy=18
Divide both sides
33dxdy=318
Divide the numbers
dxdy=318
Solution
More Steps

Evaluate
318
Reduce the numbers
16
Calculate
6
dxdy=6
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Find the second derivative
Find the second derivative with respect to x
Find the second derivative with respect to y
dx2d2y=0
Calculate
3y=2x9
Simplify the expression
3y=18x
Take the derivative of both sides
dxd(3y)=dxd(18x)
Calculate the derivative
More Steps

Evaluate
dxd(3y)
Use differentiation rules
dyd(3y)×dxdy
Evaluate the derivative
More Steps

Evaluate
dyd(3y)
Use differentiation rule dxd(cf(x))=c×dxd(f(x))
3×dyd(y)
Use dxdxn=nxn−1 to find derivative
3×1
Any expression multiplied by 1 remains the same
3
3dxdy
3dxdy=dxd(18x)
Calculate the derivative
More Steps

Evaluate
dxd(18x)
Use differentiation rule dxd(cf(x))=c×dxd(f(x))
18×dxd(x)
Use dxdxn=nxn−1 to find derivative
18×1
Any expression multiplied by 1 remains the same
18
3dxdy=18
Divide both sides
33dxdy=318
Divide the numbers
dxdy=318
Divide the numbers
More Steps

Evaluate
318
Reduce the numbers
16
Calculate
6
dxdy=6
Take the derivative of both sides
dxd(dxdy)=dxd(6)
Calculate the derivative
dx2d2y=dxd(6)
Solution
dx2d2y=0
Show Solution
