exam Maths Puzzle Numerical Ability

Solve the following system by graphing


Equation 1 in slope intercept form:
2x=4+y
2x-4=y
y=2x-4


y-intercept as an ordered pair =>
x-intercept as an ordered pair =

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exam Other Question

A car traveled for 1/2 hour at r mi/h, then increased the speed by 10 mi/h and traveled for 1 1/2 hours more. How far did the car go? (Express the answer in terms of r) The following regression equation was computed from a sample of 20 observations:

Y’ = 15 - 5X

SSE was found to be 100 and SST total 400.

Determine the standard error of