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:
Algebra and Geometry
影响因子:
--
通讯作者:
Ee
Ee
中科院分区:
--
文献类型:
--
作者:
Stephen Boyd;S. Lall;Ee

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f(0,B)是图与垂直轴相交的点,以找到定义线性函数的表达式,我们仍然可以通过将y替换为f(x)或f(x)− f(x1)= m(x − x1)来使用点斜率形式y − y1 = m(x − x1),其中m是斜率,(x1,f(x1))是直线的图形通过的有序对,我们也可以使用斜率截距形式,再次用f(x)代替y,就像我们找到线性方程时一样(y = mx + B),我们需要一条直线经过的一个点和直线的斜率来找到一个线性函数(f(x)= mx + B)。如果你没有给定直线的斜率,你可以用直线经过的任何两个点来找到它
▪ (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