What is the value of the function at x = 2? Enter your answer in the box.
2 answers:
Answer:
-2
Step-by-step explanation:
To evaluate a function when a graph of it is given, first you have to locate the point of your interest, in this case x = 2; then go up or down until you reach the line which represent the function, in this case the function is under the x-axis for x = 2, so you go down; after that you have to go left ot right to find the corresponding y-value, that is, the function value, here you have to go to left to find y = -2.
You might be interested in
A. Finding the slope
The slope of the function is simply the ratio of the value of the dependent variable over the independent variable, so in this case it is:
slope = 6/ 3 = 2
B. Finding the y – intercept
The y – intercept is simply the value of the dependent variable when the independent variable is equal to zero, therefore:
y – intercept (b) = 4
C. Finding the function of the graph
The general equation of a line is given as:
y = m x + b
where m is the slope and b is the y intercept therefore:
y = 2 x + 4
D. Finding the x – intercept
The x – intercept is simply the value of the independent variable (x) when the dependent variable (y) is equal to zero, therefore:
0 = 2 x + 4
x = - 2
E. Graph the function
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