Linear Functions
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| Correlation: | The relationship between the changes in x and the changes in y.
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| Linear function | A function that forms a line.
y=mx + b or ax + by = c.
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| Nonlinear function | Any function that does not form a line. x may be squared, or in the denominator or under a square root sign.
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| Parent function | The simplest version of each type of function.
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| Rate of change | The relationship between two amounts. For example miles per hour or dollars per hour.
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| Coefficient | A number in front of a variable.
In y = 2x +3, 2 is the ___________.
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| Constant | A number or term that does not have a variable and does not change.
In y = 2x +3, 3 is the ____________.
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| Scatterplot | A series of points on a graph. It usually represents collected data.
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| Slope | A number that represents the angle of a line. It is found by Δy/Δx or rise/run.
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| Slope-intercept form | A way to write a line that tells the slope and the y-intercept. The form is y = mx + b. “m” is the slope and “b” is the y-intercept.
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| Trend line | In a scatterplot, it is the line that runs down the middle of the points. You can use this line to make predictions about y values at different x values.
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| X-intercept | The place where a line crosses the x axis. It is also the point where y = 0.
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| Y-intercept | The place where the line crosses the y-axis. It is also the place where x = 0.
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| zeroes | The _______ of a function are the places where the function equals zero (where y = 0). It is also the x-intercepts of the function.
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| Δx | The change in x.
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| Δy | The change in y.
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| Solution | The answer to a problem. When you have an equation with one variable, it is a value of that variable that makes the equation true.
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| horizontal | A flat line running from right to left.
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| vertical | A line running up and down.
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| parallel | Two lines with the same slope. They are always the same distance from each other and never cross.
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| reciprocals | Two numbers that are fractions that are flipped.
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| scatter plot | Points on a graph that do not define a straight line but may show a general trend.
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| trend line | A line on a scatter plot that shows
the general direction or trend of the points.
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| point slope form | A way to write a linear equation that gives a point and the slope. y-y1=m(x-x1)
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| standard form | A way to write a linear equation that gives rates of change for both variables and a total amount. ax+by=c
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Created by:
meminot
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