Answer:
1440 beats
Step-by-step explanation:
Given that a doctor measured a patient's resting pulse rate at 80 beats per minute.
i.e. if no of beats in a dependent variable on time then we have a linear relationship between y - no of beats and x - no of minutes
Here slope= rate of change of y with respect to x [tex]= m=80[/tex]
And we have y intercept as 0 since when time is 0 no heart beat. i.e. (0,0) is a point on the line
The equation would be
[tex]y=80x[/tex],x≥0
When [tex]x=18, \\y = 18(80)\\y = 1440[/tex] beats.
Graph is enclosed.
