As per linear equation, during birdwatching Heath and Jaydon saw 1 fewer species at each site the day before.
What is a linear equation?
"A linear equation is an equation in which the highest power of the variable is always 1. It is also known as a one-degree equation. The standard form of a linear equation in one variable is of the form Ax + B = 0. Here, x is a variable, A is a coefficient and B is constant."
Given, during birdwatching Heath and Jaydon visited 5 different sites and saw an average of 7 species at each site in one day.
The day before that day, they saw 30 different species at 6 different sites.
Therefore, the average number of species they saw on that day at each site is
[tex]= \frac{30}{6}\\ = 5[/tex]
Therefore, the less number of species they saw at each site the day before is
[tex]= (6-5)\\= 1[/tex]
Before that day, during birdwatching, they saw 1 less number of species at each site.
Learn more about linear equation here: https://brainly.com/question/11897796
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