Which relation is a function?
1 answer:
The relation that is a function is:
b. y = 2x² - 3x + 7
<h3>When a relation is a function?</h3>A relation is a function if each value of the input is mapped to only one value of the output.
Hence, when both x and y are squared, we have that , hence it is not a function. This is the case for items a and c.
For item d, we have that the relation can be simplified as follows:
x = -y² + 3y
x = y(-y + 3)
The solution above, is associated to two values of y, hence it is also not a function. Then the function is given by:
b. y = 2x² - 3x + 7
In the solution, it can be seen that for each input x, only one value of y can be generated.
More can be learned about relations and functions at brainly.com/question/12463448
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Answer:
y = x - 4
Step-by-step explanation:
The line passes through (-1,-5) and (-3,-7)
The slope of a line is given by; change in y ÷ change in x
i.e slope = =
= 1
Taking another point (x,y) on the line.
Slope will be; = 1
Cross multiplying gives; y + 5 = x + 1
Simplifying this equation gives us the equation of our line which is;
y = x - 4