Find the value of the function y=3x2−21 when x=4 .(1 point)

Question

y=
.

Answer 1

y = 3x^2 - 21

When x = 4:

y = 3(4)^2 - 21

y = 3(16) - 21

y = 48 - 21

y = 27

So, the value of the function y = 3x^2 - 21 when x = 4 is 27.

Answer 2

Use the image to answer the question.
An illustration shows a coordinate plane with four quadrants. The x and y axes range from negative 6 to 6 in increments of 1. A semicircle is graphed on the plane. The semicircle passes through points plotted at coordinates left parenthesis negative 5 comma 0 right parenthesis, left parenthesis 0 comma 5 right parenthesis, and left parenthesis 5 comma 0 right parenthesis.

The graph of a relation is given. Apply the vertical line test to determine if this relation is a function. Enter 1 if the relation is a function. Enter 2 if the relation is not a function.(1 point)