Question

the equation for the line of best fit is ( y = 0.7x + 61 ). according to the equation, which of these statements is true?
a student who scored 0% on the pretest should score about 61% on the posttest.
a student who scored 40% on the pretest should score about 100% on the posttest.

Explanation:

Step1: Substitute \(x = 0\) into the equation

When \(x = 0\), \(y=0.7\times0 + 61\)

$$y = 61$$

Step2: Substitute \(x = 40\) into the equation

When \(x = 40\), \(y=0.7\times40+61\)

$$y = 28 + 61=89$$

Answer:

A. A student who scored \(0\%\) on the pre - test should score about \(61\%\) on the post - test.