Mathematics
Grade-8
Easy
Question
Using the linear model, y=1500x+900 predict how much the elevator will weigh if there were 6 people on it.
- 9000
- 9900
- 9009
- 900
Hint:
A linear function is of the form f(x) = mx + b where 'm' and 'b' are real numbers. A linear function represents a line, i.e., its graph is a line. Here,
- 'm' is the slope of the line
- 'b' is the y-intercept of the line
- 'x' is the independent variable
- 'y' (or f(x)) is the dependent variable
The correct answer is: 9900
A linear function is of the form f(x) = mx + b where 'm' and 'b' are real numbers. A linear function represents a line, i.e., its graph is a line. Here,
- 'm' is the slope of the line
- 'b' is the y-intercept of the line
- 'x' is the independent variable
- 'y' (or f(x)) is the dependent variable
The linear model, y=1500x+900 is a form of y = mx + b
where m = 1500 and b = 900
If there were 6 people on the elevator i.e. x = 6
y = 1500(6) + 900
y = 9900
Thus, if there were 6 people on the elevator it will weigh 9900.
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