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10 Cards in this Set
- Front
- Back
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Standard form of a line (Formula) |
ax + by = c where a,b,c are real numbers and a & b are not zero. |
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Slope-Intercept Formula |
y = mx + b m = slope b = y-intercept |
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Point-Slope Formula |
(y-y1) = m(x-x1) m = slope x1,y1 = a point given |
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Slope Formula |
m = (y2-y1) / (x2-x1) |
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When is a line parallel to another? |
When their slopes are equal |
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When is a line perpendicular to another? |
If their slopes are negative reciprocals. Example: m1=2, m2=-1/2 |
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What is the x-intercept |
A point where y = 0. Ex (x,0) |
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What is the y-intercept |
A point where x=0. Ex. (0,y). |
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What is Domain? |
Set of all x values (along x-axis) that gives a valid answer for y,when the function is evaluated. Ex. For y= x+2/x-4, the domain is all real numbers except 4 (because the denominator cant be zero) or D = {R | x!=4} or (-inf,4)U(4,inf). () indicates exclusion, [] indicate inclusion. |
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What is Range? |
Is all of the Y values, or output, of a function. Ex. y = x, the range is all Real numbers. y=x^2, the range is 0 to infinity. |
