F5 Math

Method 1 Slope-intercept form y = mx + c
x + 7y - 65 = 0
7y = - x + 65
y = - (1 / 7) x + 65 / 7
m ( slope ) = - (1 / 7)
c ( y-intercept ) = 65 / 7

Method 2 General formula ax + by + c = 0
x + 7y - 65 = 0
Slope = - a / b
Slope = - 1 / 7

Method 3 Differentiation
x + 7y - 65 = 0
1 + 7 (dy/dx) = 0 <--- Differentiation of implicit function
dy/dx = -1 / 7

For the general form of linear equation,
the slope can be found by the equation: -A/B
for the equation above,
A=1,
B=7

Therefore, the slope is -1/7.

Given the equation is x+7y-65=0
Find the slope. (With steps please)
slope=-A/B
=-(1)/(7)
=-1/7

Let x be 16.
x 7y-65=0
16 7y=65
7y=49
y=7


因為呢條式有兩個未知數
所以無一個標準答案
呢個係其中一個我自己唸的答案and step

the slope = -A / B
So,the slope of equation x+7y - 65 = 0：-(1 / 7) = -1/7