SOLUTION: f(x)=-3x

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Question 462268: f(x)=-3x
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

f%28x%29=-3x.....in order to graph this function, you need two points
take any 2 values for x and find f%28x%29
if x=0....->..f%28x%29=-3%2A0=0
if x=1....->..f%28x%29=-3%2A1=-3
so, one point is (0,0) and another one is (1,-3)
plot these points and draw a line through

Solved by pluggable solver: FIND EQUATION of straight line given 2 points
hahaWe are trying to find equation of form y=ax+b, where a is slope, and b is intercept, which passes through points (x1, y1) = (0, 0) and (x2, y2) = (1, -3).
Slope a is a+=+%28y%5B2%5D-y%5B1%5D%29%2F%28x%5B2%5D-x%5B1%5D%29+=+%28-3-0%29%2F%281-0%29+=+-3.
Intercept is found from equation a%2Ax%5B1%5D%2Bb+=+y%5B1%5D, or -3%2A0+%2Bb+=+0. From that,
intercept b is b=y%5B1%5D-a%2Ax%5B1%5D, or b=0--3%2A0+=+0.

y=(-3)x + (0)

Your graph: