Percentage of U.S. Households in Which Married Couples Do Not Share the Same Faith 35% 32 1988 30% 2012 25% 20% 15% 12 10% 5% Faith/No Religion Marriage Interfaith Marriage Percentage of Households 26
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Equations and inequalities describe the relationship between two mathematical expressions.
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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.
In more U.S. marriages, spouses have different faiths. The bar graph shows the percentage of households with an interfaith marriage in 1988 and 2012. Also shown is the percentage of households in which a person of faith is married to someone with no religion. The formula I = (1/4)x + 26. models the percentage of U.S. households with an interfaith marriage, I, x years after 1988. The formula N = (1/4)x + 6 models the percentage of U.S. households in which a person of faith is married to someone with no religion, N, x years after 1988.
Use these models to solve: In which years will more than 15% of U.S. households have a person of faith married to someone with no religion?
The formula for percent of U.S. households with an interfaith marriage,
The formula for percent of households in which a person of faith is married to someone with no religion,
According to the given condition,
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