Question

Given the equation −4x + y = 8, what are the x- and y-intercepts of the graph?
x-intercept = 8 and y-intercept = −2
x-intercept = 2 and y-intercept = −8
x-intercept = −2 and y-intercept = 8<=== My Answer
x-intercept = −8 and y-intercept = 2

Line m passes through the point (4, 1) and has a slope of -1/3. What is the equation of line m in standard form?
x + 3y = 13
x + 3y = 7
3x + y = 7
3x + y = 13<=== My Answer

What function is represented by the following graph?
http://greed1995.deviantart.com/art/Algebra-429447282
f(x) = (−x)^3
f(x) = x + 3
f(x) = 3x
f(x) = x^3<=== My Answe

Answer 1

1. to find y intercept, sub in 0 for x and solve for y
to find x intercept, sub in 0 for y and solve for x
can you do that ?

Answer 2

The first one is correct.

Answer 3

The third is also right.

Answer 4

2. y = mx + b
1 = -1/3(4) + b
1 = -4/3 + b
1 + 4/3 = b
3/3 + 4/3 = b
7/3 = b
y = -1/3x + 7/3 -- multiply by 3
3y = -x + 7 -- add x
x + 3y = 7

I got this for your second one

Answer 5

And for the second,

y - 1 = -1/3(x-4)

y - 1 = -1/3x + 4/3

Re arrange - .. I think


y + 1/3x = 4/3 + 1

Multiply by 3,

3(y + 1/3x) = 3(4/3 + 1)

3y + x = 4 + 3

3y + x = 7

Answer 6

LaTeX >.<

Answer 7

Thank you!!