Question

a scatter plot is shown. the equation y = 1.1x + 15.8 is a good line of fit for the data. use the equation for the trend line to determine an estimated value of y, to the nearest whole number, when x = 170.

Explanation:

Step1: Substitute x - value

Substitute $x = 170$ into $y=1.1x + 15.8$.
$y=1.1\times170+15.8$

Step2: Calculate multiplication

Calculate $1.1\times170$.
$1.1\times170 = 187$
So $y=187 + 15.8$

Step3: Calculate addition

Calculate $187+15.8$.
$y=202.8$

Step4: Round to nearest

Round $202.8$ to the nearest whole - number.
$y\approx203$

Answer:

$203$