Question

question 18
a trend line has the equation y = 4x - 1. predict the value of y when x = 3.
y =
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Explanation:

Step1: Substitute x value

Substitute $x = 3$ into $y=4x - 1$.
$y=4\times3 - 1$

Step2: Perform multiplication

Calculate $4\times3$.
$4\times3=12$, so $y = 12-1$

Step3: Perform subtraction

Calculate $12 - 1$.
$y=11$

Answer:

$11$