Answer:
C. 3/5
Step-by-step explanation:
Its the closest to 3/9
Rodney's errors on each of the graphs given can be explained as in the explanation below.
<h3>Linear graphs of slope-intercept form equations</h3>
Rodney's error on each of the given linear graphs are as follows;
For y= 30x +10;
- The slope of the graph is 30 and it's intercept is; 10. Hence, the graph should intersect/touch the y-axis at (0,10)
For y= (-1/2)x +5;
- The slope of the given function is; -1/2 and hence, the graph should be a decreasing linear graph.
For y= x -2;
- The slope and intercept of the given function are 1 and -2 respectively. On this note, the graphed line should intersect the y-axis at point (0, -2) and the graph should be an increasing linear graph.
Read more on linear graphs;
brainly.com/question/14323743
Answer:
86
Step-by-step explanation:
Firstly,
Average = Sum/Number of Numbers
Since 7 grades' average is 77, so we can say:
77 = Sum/7
Hence, Sum = 77 * 7 = 539
Now,
81 - 18 = 63 [63 marks were recorded incorrectly. actual sum would be 63 more]
So,
Actual Sum should be 539 + 63 = 602
Actual Average = 602 / 7 = 86
Hence, actual report card average would be 86