Linear functions
Linear functions
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线性函数
DOI:
10.1007/978-3-642-59277-5_1
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Ee
中科院分区:
文献类型:
--
作者:
Stephen Boyd;S. Lall;Ee
▪ (0, b) is point where the graph crosses the vertical axis to find the expression that defines a linear function, we can still use point-slope form y − y1 = m(x − x1) by replacing y with f(x) o f(x) − f(x1) = m(x − x1), where m is the slope and (x1, f(x1)) is an ordered pair that the graph of the line passes through o we could also use slope-intercept form, again replacing y with f(x) ▪ f(x) = mx + b just like when we found linear equations (y = mx + b), we need one point that a line passes through and the slope of the line to find a linear function (f(x) = mx + b) o if you are not given the slope of a line, you can find it using any two points that the line passes through