Answer:
option A : graph is a function
Step-by-step explanation:
(a) option is given is a graph
For graph , the function should pass vertical line test
Draw vertical line for every value of x
The vertical lines cross only one red point at a time
So the graph is a function
(b) When each input has only one output then it is a function
in option B , input 3 has two output -5 and 0
so it is not a function
(c) in option C , input 3 has two output 14 and 19
so it is not a function
(d) in option d , input -1 has two output -11 and 5
so it is not a function
Answer
• Line m: x = 3
,
• Line n: y = –4
Explanation
If a line has no y-intercept, it means it must be parallel to the y - axis. Thus, it is a vertical line that will only cross the x-axis once (in this case).
As we are given that the x-intercept is (3,0), then the equation of line m is:

Following the same logic, if a line has no x-intercept, it will be parallel to the x-axis and it will be a vertical line.
As we are given that the y-intercept is (0,-4), then the equation of line n is:
<h3>
Answer:</h3>
a) TI = 7√3 in
b) IR = 7 in
<h3>
Explanation:</h3>
<u>Using cosine rule</u>:




<u>Using sine rule</u>:




The percentage of boys in the class is 55%. This is because there are 20 people in the class, and 11/20= .55, or 55%