Question

Tell whether each point is on the graph of y=3x squared minus 5

Answer 1

`\begin{gathered} We\text{ are given a function} \\ y=3x^2\text{ - 5} \\ \text{The point given is (-3, -32)} \\ \text{where x = -3, and y = -32} \\ Substitute\text{ the values in the above function} \\ -32=3(-3)^2\text{ - 5} \\ -32=\text{ 3(9) - 5} \\ -32\text{ = 27 - 5 } \\ -32\text{ = 22} \\ \text{Hence, the point (-3, -32) is not on the graph y = 3x}^2\text{ - 5} \end{gathered}`

From the above explanation, the value of y gotten from the function when x = -3 does not match with the value given