The graph represents function 1 and the equation represents function 2: Function 1

Function 2
y = 2x + 1
How much more is the rate of change of function 2 than the rate of change of function 1?
1
2
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4

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Which three lengths could be the lengths of the sides of a triangle? 21 cm, 7 cm, 7 cm 9 cm, 15 cm, 22 cm 13 cm, 5 cm, 18 cm 8 cm, 23 cm, 11 cm

Frank has a devised a formula for his catering business that calculates the number of meatballs he needs to prepare. the formula is m=4a+2c, where c=number of children; m=number of meatballs; a=number of adults. how many meatballs are required for a party of 10 adults and 5 children?