Answer:
Sarah is correct
Step-by-step explanation:
Required
Which of the students is correct
Let a number be x,
Given what the teacher asked the students to do, the solution is:
Only Sarah got this correctly; others are incorrect.
The proof is as follows.
For Sarah
So, the numbers will be: 1416, -1416 and 1416
<em>Other students are incorrect</em>
The x-axis goes left and right, the second coordinate is on the y-axis.The y-axis goes up and down.Positive numbers go up or right (depending on the axis). Negative numbers go left or down.Quadrant I gets (+,+); quadrant I is above and to the left of the y-axis.Quadrant IV gets (+,-); quadrant IV is below the x-axis and to the right of the y-axis. (5,4) is in quadrant I.(-5,4) is in Quadrant II. (-5,-4) is in Quadrant III. (5,-4) is in Quadrant IV.
Answer:
Step-by-step explanation:
The annual number of cases can be modeled using a quadratic equation y = 14x2 – 9x + 1. the variable x represents the number of years after 2008. the variable y represents the number of pertussis cases in year x. according to the equation, in what year can the county be expected to have 2,619 cases of pertussis?
