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Question

One student was charged $25 for

3 hours of tutoring. Another student was charged $55 for 7 hours of tutoring. The

relationship between the cost and time is linear. Designate two data values for

this problem. State the dependent and independent variables.

Answer 1

If linear, then

y=mx+b

Where m is the slope and b is the y-intercept.

Two data values for (x,y) = (3,25) and (7,55)

x is the independent variable

y is the dependent variable

You can solve for m and b by using the data points to get two equations.

25 = m(3)+b

55 = m(7)+b

y=7.5x+2.5