Find the variance and standard deviation 10 - 19 5 20-29 11 30 -39 7 40-49 3 50-59 8 please show me the step .. Thank you

Aline has a slope of 1/4 and passes through point (0.4,-1/2). what is the value of the y-intercept?

100 points, hi, i’m not sure how to get the equation from the graph and table.

Drag each tile into the correct box. not all tiles will be used. find the tables with unit rates greater than the unit rate in the graph. then tenge these tables in order from least to greatest unit rate