y = ax + b
P = (2,-1)
x = 2
y = -1
podstawiamy wartości pod wzór podanej funkcji:
[tex]y = mx + \frac{5}{2} \\\\-1 = m * 2 + \frac{5}{2} \\\\2m = -1 - \frac{5}{2} \\\\2m = -1 - 2\frac{1}{2} \\\\2m = -3\frac{1}{2} \\\\2m = -\frac{7}{2} /:2\\\\m = -\frac{7}{2} * \frac{1}{2} =-\frac{7}{4}[/tex]
[tex]f(x) = -\frac{7}{4} x+\frac{5}{2}[/tex]
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y = ax + b
P = (2,-1)
x = 2
y = -1
podstawiamy wartości pod wzór podanej funkcji:
[tex]y = mx + \frac{5}{2} \\\\-1 = m * 2 + \frac{5}{2} \\\\2m = -1 - \frac{5}{2} \\\\2m = -1 - 2\frac{1}{2} \\\\2m = -3\frac{1}{2} \\\\2m = -\frac{7}{2} /:2\\\\m = -\frac{7}{2} * \frac{1}{2} =-\frac{7}{4}[/tex]
[tex]f(x) = -\frac{7}{4} x+\frac{5}{2}[/tex]