Use the graph of fx below gx 2x 3 and the table of hx for 91
Use the graph of f(x) below, g(x) 2x 3, and the table of h(x) for 9-10. or 1 2 3
Solution
We have given the graph of f(x)
Also g(x) = 2x + 3
Here slope = coefficient of x = 2
y-intercept = 3
Now consider the graph of function f(x).
COnsider any two points on the line are (-2,1) and (-1,2).
Now find slope and y-intercept as :
slope = (y2-y1)/(x2-x1)
= (2-1) / (-1-(-2)) = 1/1 = 1
slope = 1
Therefore the equation of the line is,
(y-y1) = slope*(x-x1)
(y - 1) = 1 * (x-(-2))
y-1 = x+2
y = x+2 + 1
y = x+3
Therefore slope = 1
y-intercept = 3
ANd for function g(x) :
slope = 2
y-intercept = 3
Comparison : Here y-intercept for both the lines are same but slopes are different.
SLope of the line g(x) is greator than that od line f(x).
