Write the equation of the line that passes through the points (3, 6) and (4, 10) using function notation.

f(x) = 4x − 6
f(x) = x + 4
y = x + 4
y = 4x − 6

Question

Write the equation of the line that passes through the points (3, 6) and (4, 10) using function notation.

 f(x) = 4x − 6
 f(x) = x + 4
 y = x + 4
 y = 4x − 6

oswaldmurphy · Answer

@pooja195

oswaldmurphy · Answer

@mathstudent55

archaists · Answer

@OswaldMurphy it's  f(x) = 4x − 6

oswaldmurphy · Answer

Is it because its crossing and it goes through x1 and y2?

archaists · Answer

@OswaldMurphy It's because when you plot the points and then calculate the slope, it will give you 4. Then you can plug it into y=mx+b, to find b, which will be -6. Function notation just means that it will have f(x).

oswaldmurphy · Answer

Since I am finding x here do I replace both x's with 15? (another problem, don't solve just answer this please :D)
Given that f(x) = 2x − 5, find the value of x that makes f(x) = 15

archaists · Answer

Is this another question?

archaists · Answer

Ohhhh, I see, x=20 then.

f(x)=2x-5
f(x)=2*10-5
f(x)=20-5
f(x)=15