functions unit test cheat sheet

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The domain is 'x' and the range is 'y'.

Know that the y-intercept is where x = zero

y^2 is nonlinear and never a function, x^2 is nonlinear, 1/x is nonlinear, square root of x is nonlinear. In a table, if x and y do not increase in a constant rate, it is nonlinear.

The number b is the coordinate on the y-axis where the graph crosses the y-axis.

Infinite (same line) and no solutions (same slope, different y-intercept)

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