The number of hours it takes for ice to melt varies inversely with the air temperature. Suppose a block of ice melts in 2 hours when the temperature is 65 degrees Celsius. ⓐ Write the equation of variation. ⓑ How many hours would it take for the same block of ice to melt if the temperature was 78 degrees?

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Q: If the constant variation is 7 and y varies directly with x, write the equation variation?

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Q: X, + X, - X, = 6 3 X, - 4 X, + 2X, = -2 2 X, + 5 X, + X, = 0

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Q: Write the equation in slope-intercept form for the line passing through (-5,1) and perpendicular to…

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Q: 6) 8x + y=-16 -3x + y = -5

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Q: If 10 shirts cost a $130 30 shirts cost $240 write a linear equation that gives you the cost

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.