Question

Function and notaion.​

Answer 1

Answer: 45

Step-by-step explanation:

• Function notation: is another way of writing a function to make it easy to understand
• Instead of the independent and dependent variables being x and y they are now x and f(x)
• f(x) can be interpreted as the y value at a given x value
• in this case f(-5) must be solved for, essentially saying what is y when the x value is -5

$f(-5)=2(-5)^{2} -5$

$f(-5)= 2(25) -5$

$f(-5) = 50-5$

$f(-5) = 45$