Problem: help! Find all x-intercepts and y-intercepts, if no intercepts exist say so
f(x)=5x-8 f(x)=3x , f(x)=5
i dont get how to solve these and find the intercepts....
In place of f(x), substitute y. To find the y-intercept, set x to zero.
To find the x-intercept, set y to zero.
f(x) = 5x - 8
y = 5x - 8
y = 5(0) - 8
y = -8, the y-intercept
y = 5x - 8
0 = 5x - 8
5x = 8
x = 8/5, the x-intercept
f(x) = 3x
y = 3x
y = 3(0)
y = 0, the y-intercept
y = 3x
0 = 3x
3x = 0
x = 0/3 = 0, the x-intercept
f(x) = 5
y = 5, the y-intercept
There is no x term, so there is no x-intercept
This represents a horizontal line five units above
the x-axis.