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Chp. 4 Vocabulary

Across
y = f(x) = a + bx
The axes of a two-dimensional Cartesian system divide the plane into four infinite regions, each bounded by two half-axes .
y=mx+b
y − y1 = m(x − x1)
where the graph crosses the x-axis.
Down
where the graph crosses the y-axis.
a visual way to determine if a curve is a graph of a function or not. A function can only have one output, y, for each unique input, x.
a pair of elements a, b having the property that ( a, b) = (u, v ) if and only if a = u, b = v.
characterizes the direction of a line.
a relationship or expression involving one or more variables