Question

predicting a math score
math scores vs. science scores
use the trend line to predict jons math score based on his science score of 85. round to the nearest integer, if necessary.
y = 0.9x + 6.8

Explanation:

Step1: Substitute \(x = 85\) into the equation

Given the equation \(y=0.9x + 6.8\), substitute \(x = 85\). So we have \(y=0.9\times85+6.8\).

Step2: Calculate the value of \(y\)

First, calculate \(0.9\times85\). \(0.9\times85=(1 - 0.1)\times85=85-8.5 = 76.5\). Then add \(6.8\) to it: \(y=76.5+6.8=83.3\).

Answer:

\(83\)