She practiced 630 hours in all because you multiply 18x35
Most likely ill go with option c
Not it doesn’t form a right angle because if you add it all together it makes it 54
The answer is 6,5 on the graph
You put the values of x into the equation to work out y, so the y column would be -5, -1, 3, 7 (for question 6)
For question 7, the y column would be 2,2,0,-2
Use these values to draw the graphs :)
