Answer:
The absolute value of -3 is 3.
Step-by-step explanation:
Absolute value is the distance between a number and zero on a number line. To solve for absolute value, solve inside the absolute value sign (it is also a grouping symbol), and if it is positive, the number inside is the absolute value. If it is negative, remove the negative sign to get your answer.
Answer is A im a full course teacher for this subject
The third one, this is because you take your y2 and y1 values (y2=0 and y1=9 because these are the two y values given to you from each coordinate) and subtract 0-9. then you do the same, but with the x2 and x1 values. so your x1 value is 3 and your x2 value is 0, so you subtract 0 from 3. divide your second answer from the first answer, to get a gradient of -1/3 x. now using the first coordinate (0,9) you know that the y coordinate is 9. as the x value =0, we know that the line is passing through the y axis at 9 so 9 is your y intercept. this gives you the equation -1/3x+9. hope this helped and wasn't too confusing!
16 it's just double the the denominator and the top number
