A kettle of water is heated and the temperature of the water, j°C, after k minutes, is given by j = 5k + 30. Copy and complete the table. Graph the
relationship between k and j. Use 1 unit on the horizontal axis to represent
1 minute and 1 unit on the vertical axis to represent 5°C.
a)
Time (k
minutes)
0
2
4
6
b)
What is the temperature of the water after 5 minutes?
c)
What is the average rate of the heating?
d)
Assuming the temperature of the water rises at a constant rate, what is
the temperature of the water after 10 minutes?
e)
The kettle of water needs to be heated till the water boils. For how
many minutes does the kettle need to be heated? Express your answer
in terms of k, where k stands for the number of minutes. (Hint: Water
boils at 100°C.)

Ascientist studied a population of workers to determine whether verbal praise and/or tangible rewards affect employee productivity. in the study, some workers were offered verbal praise, some were offered tangible rewards (gift cards, presents, and some were offered neither. the productivity of each participant was measured throughout the study by recording the number of daily tasks completed by each employee. which inference might the scientists make based on the given information? a.) the number of daily tasks completed by each employee may influence the dependent variable, which is whether the employee receives verbal praise, tangible rewards, or neither. b.) verbal praise and/or tangible rewards may influence the independent variable, which is the number of daily tasks completed by each employee. c.) verbal praise and/or tangible rewards may influence the dependent variable, which is the number of daily tasks completed by each employee. d.) the dependent variables, which are verbal praise and tangible rewards, may influence the number of daily tasks completed by each employee.